Search results for "Lot Sizing"

Hits ?▲	Authors	Title	Venue	Year	Link	Author keywords
3	Claudio Fabiano Motta Toledo, Lucas de Oliveira, Renato Resende Ribeiro de Oliveira, Marluce Rodrigues Pereira	Parallel genetic algorithm approaches applied to solve a synchronized and integrated lot sizing and scheduling problem.	SAC	2010	DBLP DOI BibTeX RDF	multi-population, soft drink company, scheduling, parallel genetic algorithms, lot sizing
3	Shoshana Anily, Michal Tzur, Laurence A. Wolsey	Multi-item lot-sizing with joint set-up costs.	Math. Program.	2009	DBLP DOI BibTeX RDF	Multi-item lot-sizing, Joint set-up cost, Extended formulation, Convex hull, Mixed integer programming
3	Ruichun Yang, Zhen Wang, Dachuan Xu	A Cost-Sharing Method for the Soft-Capacitated Economic Lot-Sizing Game.	COCOA	2009	DBLP DOI BibTeX RDF	Economic lot-sizing game, cost-sharing method, cross- monotonic, approximate cost recovery
3	Guy Even, Retsef Levi, Dror Rawitz, Baruch Schieber, Shimon Shahar, Maxim Sviridenko	Algorithms for capacitated rectangle stabbing and lot sizing with joint set-up costs.	ACM Transactions on Algorithms	2008	DBLP DOI BibTeX RDF	capacitated covering, rectangle stabbing, Approximation algorithms, lot sizing
3	Sanja Petrovic, Carole Fayad, Dobrila Petrovic, Edmund K. Burke, Graham Kendall	Fuzzy job shop scheduling with lot-sizing.	Annals OR	2008	DBLP DOI BibTeX RDF	Fuzzy multi-objective genetic algorithm, Job shop scheduling, Batching, Real-world application, Lot-sizing, Fuzzy rule-based system, Dispatching rules
3	Deisemara Ferreira, Paulo Morelato França, Alf Kimms, Reinaldo Morabito, Socorro Rangel, Claudio Fabiano Motta Toledo	Heuristics and meta-heuristics for lot sizing and scheduling in the soft drinks industry: a comparison study.	Metaheuristics for Scheduling in Industrial and Manufacturing Applications	2008	DBLP DOI BibTeX RDF	Two-level Production Planning, Soft Drinks Industry, Genetic Algorithm, Scheduling, Memetic Algorithm, Lot Sizing
3	Claudio Fabiano Motta Toledo, Paulo Morelato França, Kalianne Almeida Rosa	Evaluating genetic algorithms with different population structures on a lot sizing and scheduling problem.	SAC	2008	DBLP DOI BibTeX RDF	multi-population, soft drink company, genetic algorithms, scheduling, lot sizing
3	Alexandre Dolgui, Mikhail Y. Kovalyov, Kseniya Shchamialiova	Lot-Sizing and Sequencing on a Single Imperfect Machine.	MCO	2008	DBLP DOI BibTeX RDF	Imperfect production, Sequencing, Lot-sizing
3	Silvio A. de Araujo, Marcos N. Arenales, Alistair R. Clark	Joint rolling-horizon scheduling of materials processing and lot-sizing with sequence-dependent setups.	J. Heuristics	2007	DBLP DOI BibTeX RDF	Sequence-dependent setup costs and times, Fix-and-relax, Scheduling, Local search, Lot-sizing
3	Fabrizio Marinelli, Maria Elena Nenni, Antonio Sforza	Capacitated lot sizing and scheduling with parallel machines and shared buffers: A case study in a packaging company.	Annals OR	2007	DBLP DOI BibTeX RDF	Scheduling, Packaging, Lot sizing
3	Laurence A. Wolsey	Lot-sizing with production and delivery time windows.	Math. Program.	2006	DBLP DOI BibTeX RDF	Production time windows, Convex hull, Mixed integer programming, Lot-sizing
3	Sergei Chubanov, Mikhail Y. Kovalyov, Erwin Pesch	An FPTAS for a single-item capacitated economic lot-sizing problem with monotone cost structure.	Math. Program.	2006	DBLP DOI BibTeX RDF	Capacitated economic lot-sizing problem, Dynamic programming, Fully polynomial time approximation scheme
3	Mathieu Van Vyve	Linear-programming extended formulations for the single-item lot-sizing problem with backlogging and constant capacity.	Math. Program.	2006	DBLP DOI BibTeX RDF	Constant capacity, Backlogging, Extended formulation, Lot-sizing
3	Yongpei Guan, Shabbir Ahmed, George L. Nemhauser, Andrew J. Miller	A branch-and-cut algorithm for the stochastic uncapacitated lot-sizing problem.	Math. Program.	2006	DBLP DOI BibTeX RDF	Stochastic Lot-Sizing, Multi-stage Stochastic Integer Programming, Polyhedral Study, Branch-and-Cut
2	Yves Pochet, Laurence A. Wolsey	Single item lot-sizing with non-decreasing capacities.	Math. Program.	2010	DBLP DOI BibTeX RDF	Mathematics Subject Classification (2000) 90C11, 90C57
2	Simge Küçükyavuz, Yves Pochet	Uncapacitated lot sizing with backlogging: the convex hull.	Math. Program.	2009	DBLP DOI BibTeX RDF	Mathematics Subject Classification (2000) 90C11, 90C57
2	Sandra Duni Eksioglu, Burak Eksioglu	Economic Lot-Sizing Problem.	Encyclopedia of Optimization	2009	DBLP DOI BibTeX RDF	Economic lot-sizing problem, Dynamic programming, Primal-dual algorithm, Valid inequality
2	Jui-Tsung Wong, Kuei-Hsien Chen, Chwen-Tzeng Su	Replenishment Policy with Deteriorating Raw Material Under a Supply Chain: Complexity and the Use of Ant Colony Optimization.	UNISCON	2009	DBLP DOI BibTeX RDF	dynamic lot-sizing problem, deteriorating raw material, complexity, Ant colony optimization
2	Wikrom Jaruphongsa, Chung-Yee Lee	Dynamic lot-sizing problem with demand time windows and container-based transportation cost.	Optimization Letters	2008	DBLP DOI BibTeX RDF
2	Nabil Absi	Models and methods for capacitated lot-sizing problems.	4OR	2008	DBLP DOI BibTeX RDF	MSC classification 90B30, 90C27, 90C57, 90C59, 90C11, 90C39
2	Daniel Quadt, Heinrich Kuhn	Capacitated lot-sizing with extensions: a review.	4OR	2008	DBLP DOI BibTeX RDF	MSC Classification (2000) 90B30, 90B35, 90C27, 90C90, 90C10, 90C59
2	Sônia Cristina Poltroniere, Kelly Cristina Poldi, Franklina Maria Bragion Toledo, Marcos Nereu Arenales	A coupling cutting stock-lot sizing problem in the paper industry.	Annals OR	2008	DBLP DOI BibTeX RDF	Lot sizing and scheduling problems, Lagrangian relaxation, Cutting stock problems
2	Feng Chu, Chengbin Chu	Single-Item Dynamic Lot-Sizing Models With Bounded Inventory and Outsourcing.	IEEE Transactions on Systems, Man, and Cybernetics, Part A	2008	DBLP DOI BibTeX RDF
2	Yongpei Guan, Andrew Miller	A Polynomial Time Algorithm for the Stochastic Uncapacitated Lot-Sizing Problem with Backlogging.	IPCO	2008	DBLP DOI BibTeX RDF
2	Jerzy Duda, Andrzej Osyczka	A genetic algorithm for lot sizing optimization with a capacity loading criterion.	IEEE Congress on Evolutionary Computation	2007	DBLP DOI BibTeX RDF
2	Retsef Levi, Andrea Lodi, Maxim Sviridenko	Approximation Algorithms for the Multi-item Capacitated Lot-Sizing Problem Via Flow-Cover Inequalities.	IPCO	2007	DBLP DOI BibTeX RDF	scheduling theory and algorithms, approximation algorithms, integer programming, randomized algorithms, polyhedral combinatorics
2	Lars Fischer, Sascha Herpers, Michael Manitz	Service-Level Oriented Lot Sizing Under Stochastic Demand.	OR	2007	DBLP DOI BibTeX RDF
2	Tobias Schulz	Lot Sizing Policies for Remanufacturing Systems.	OR	2007	DBLP DOI BibTeX RDF
2	Bo Chen, Yinyu Ye, Jiawei Zhang	Lot-sizing scheduling with batch setup times.	J. Scheduling	2006	DBLP DOI BibTeX RDF	Batch setup time, Scheduling, Approximation algorithm, Approximation scheme, Lot-sizing
2	Jafar Rezaei, Mansoor Davoodi	Genetic Algorithm for Inventory Lot-Sizing with Supplier Selection Under Fuzzy Demand and Costs.	IEA/AIE	2006	DBLP DOI BibTeX RDF
2	Guoli Liu, Lixin Tang	Model and Solution for the Multilevel Production-Inventory System Before Ironmaking in Shanghai Baoshan Iron and Steel Complex.	ICCSA	2006	DBLP DOI BibTeX RDF	combinatorial optimization, lagrangian relaxation, Lot-sizing
2	Mathieu Van Vyve, Laurence A. Wolsey	Approximate extended formulations.	Math. Program.	2006	DBLP DOI BibTeX RDF	Extended formulation, Approximation, Traveling salesman problem, Convex hull, Mixed integer programming, Lot-sizing
2	Jerzy Duda	Lot-Sizing in a Foundry Using Genetic Algorithm and Repair Functions.	EvoCOP	2005	DBLP DOI BibTeX RDF
2	Weizhen Yan, Jianhua Zhao, Zhe Cao	Fuzzy Programming Model for Lot Sizing Production Planning Problem.	FSKD	2005	DBLP DOI BibTeX RDF
2	João Pedro Pedroso, Mikio Kubo	Hybrid Tabu Search for Lot Sizing Problems.	Hybrid Metaheuristics	2005	DBLP DOI BibTeX RDF
2	Silvanus T. Enns, Pattita Suwanruji	Lot-sizing within capacity-constrained manufacturing systems using time-phased planning.	Winter Simulation Conference	2005	DBLP DOI BibTeX RDF
2	Sanja Petrovic, Carole Fayad	A Genetic Algorithm for Job Shop Scheduling with Load Balancing.	Australian Conference on Artificial Intelligence	2005	DBLP DOI BibTeX RDF	fuzzy logic and fuzzy sets, genetic algorithms, load balancing, Job shop scheduling, lot-sizing
2	Fred Glover, Hanif D. Sherali	Some Classes of Valid Inequalities and Convex Hull Characterizations for Dynamic Fixed-Charge Problems under Nested Constraints.	Annals OR	2005	DBLP DOI BibTeX RDF	dynamic fixed-charge problems, capacitated lot-sizing, convex hull, valid inequalities, reformulation-linearization technique
2	Mathieu Van Vyve	A solution approach of production planning problems based on compact formulations for single-item lot-sizing models.	4OR	2004	DBLP DOI BibTeX RDF
2	Alper Atamtürk, Juan Carlos Muñoz	A study of the lot-sizing polytope.	Math. Program.	2004	DBLP DOI BibTeX RDF
2	Feng Chu, Chengbin Chu, Xiao Liu	Lot sizing models with backlog or out-sourcing.	SMC	2004	DBLP DOI BibTeX RDF
2	Marko Loparic, Hugues Marchand, Laurence A. Wolsey	Dynamic knapsack sets and capacitated lot-sizing.	Math. Program.	2003	DBLP DOI BibTeX RDF
2	In Lee, Jatinder N. D. Gupta, Amar D. Amar	A multi-neural-network learning for lot sizing and sequencing on a flow-shop.	SAC	2001	DBLP DOI BibTeX RDF	neural networks, sequencing, lot sizing, flow-shop
2	Andrew J. Miller, George L. Nemhauser, Martin W. P. Savelsbergh	Facets, Algorithms, and Polyhedral Characterizations for a Multi-item Production Planning Model with Setup Times.	IPCO	2001	DBLP DOI BibTeX RDF	capacitated lot-sizing, fixed charge network flow, Mixed integer programming, polyhedral combinatorics, production planning, setup times
1	R. P. Tripathi, S. S. Misra	Retailer's Pricing and Lot Sizing Policy for Non Deteriorating Items with Constant Demand Rate Under the Condition of Permissible Delay in Payments.	IJORIS	2012	DBLP DOI BibTeX RDF
1	Alejandro Toriello, George L. Nemhauser	The value function of an infinite-horizon single-item lot-sizing problem.	Oper. Res. Lett.	2012	DBLP DOI BibTeX RDF
1	Yijia Zhao, Diego Klabjan	A polyhedral study of lot-sizing with supplier selection.	Discrete Optimization	2012	DBLP DOI BibTeX RDF
1	Céline Gicquel, Laurence A. Wolsey, Michel Minoux	On discrete lot-sizing and scheduling on identical parallel machines.	Optimization Letters	2012	DBLP DOI BibTeX RDF
1	Guowei Hua, Shouyang Wang, T. C. E. Cheng	Optimal order lot sizing and pricing with free shipping.	European Journal of Operational Research	2012	DBLP DOI BibTeX RDF
1	Laurent Flindt Muller, Simon Spoorendonk, David Pisinger	A hybrid adaptive large neighborhood search heuristic for lot-sizing with setup times.	European Journal of Operational Research	2012	DBLP DOI BibTeX RDF
1	Seyed Jafar Sadjadi, Seyed Ahmad Yazdian, Kamran Shahanaghi	Optimal pricing, lot-sizing and marketing planning in a capacitated and imperfect production system.	Computers & Industrial Engineering	2012	DBLP DOI BibTeX RDF
1	Yiyong Xiao, Ikou Kaku, Qiuhong Zhao, Ren-qian Zhang	Neighborhood search techniques for solving uncapacitated multilevel lot-sizing problems.	Computers & OR	2012	DBLP DOI BibTeX RDF
1	G. S. Piperagkas, I. Konstantaras, K. Skouri, Konstantinos E. Parsopoulos	Solving the stochastic dynamic lot-sizing problem through nature-inspired heuristics.	Computers & OR	2012	DBLP DOI BibTeX RDF
1	Tobias Buer, Jörg Homberger, Hermann Gehring	A collaborative ant colony metaheuristic for distributed multi-level lot-sizing	CoRR	2012	DBLP BibTeX RDF
1	Chen Yao, Christos G. Cassandras	A Solution to the Optimal Lot-Sizing Problem as a Stochastic Resource Contention Game.	IEEE T. Automation Science and Engineering	2012	DBLP DOI BibTeX RDF
1	Ouerfelli Hala, Abdelaziz Dammak, Emna Kallel Chtourou	Benders-based approach for an integrated Lot-Sizing and Scheduling problem.	IJCOPI	2012	DBLP BibTeX RDF
1	Claudio Fabiano Motta Toledo, Márcio da Silva Arantes, Paulo Morelato França, Reinaldo Morabito	A Memetic Framework for Solving the Lot Sizing and Scheduling Problem in Soft Drink Plants.	Variants of Evolutionary Algorithms for Real-World Applications	2012	DBLP DOI BibTeX RDF
1	Muhong Zhang	Two-stage minimax regret robust uncapacitated lot-sizing problems with demand uncertainty.	Oper. Res. Lett.	2011	DBLP DOI BibTeX RDF
1	Ruiwei Jiang, Yongpei Guan	An O(N2)-time algorithm for the stochastic uncapacitated lot-sizing problem with random lead times.	Oper. Res. Lett.	2011	DBLP DOI BibTeX RDF
1	Michael R. Wagner	Online lot-sizing problems with ordering, holding and shortage costs.	Oper. Res. Lett.	2011	DBLP DOI BibTeX RDF
1	Mariana S. Escalante, Javier L. Marenco, María del Carmen Varaldo	A polyhedral study of the single-item lot-sizing problem with continuous start-up costs.	Electronic Notes in Discrete Mathematics	2011	DBLP DOI BibTeX RDF
1	Dinakar Gade, Simge Küçükyavuz	A Note on "Lot-sizing with fixed charges on stocks: The convex hull".	Discrete Optimization	2011	DBLP DOI BibTeX RDF
1	Nishikant Mishra, Vikas Kumar, Niraj Kumar, M. Kumar, Manoj Kumar Tiwari	Addressing lot sizing and warehousing scheduling problem in manufacturing environment.	Expert Syst. Appl.	2011	DBLP DOI BibTeX RDF
1	Yongpei Guan	Stochastic lot-sizing with backlogging: computational complexity analysis.	J. Global Optimization	2011	DBLP DOI BibTeX RDF
1	Xi Chen, Archis Ghate, Arvind Tripathi	Dynamic lot-sizing in sequential online retail auctions.	European Journal of Operational Research	2011	DBLP DOI BibTeX RDF
1	S. Armagan Tarim, Mustafa K. Dogru, Ulas Özen, Roberto Rossi	An efficient computational method for a stochastic dynamic lot-sizing problem under service-level constraints.	European Journal of Operational Research	2011	DBLP DOI BibTeX RDF
1	Tao Wu, Leyuan Shi, Joseph Geunes, Kerem Akartunali	An optimization framework for solving capacitated multi-level lot-sizing problems with backlogging.	European Journal of Operational Research	2011	DBLP DOI BibTeX RDF
1	Irena Okhrin, Knut Richter	An O(T3) algorithm for the capacitated lot sizing problem with minimum order quantities.	European Journal of Operational Research	2011	DBLP DOI BibTeX RDF
1	Hartmut Stadtler	Multi-level single machine lot-sizing and scheduling with zero lead times.	European Journal of Operational Research	2011	DBLP DOI BibTeX RDF
1	Wilco van den Heuvel, José Miguel Gutiérrez, Hark-Chin Hwang	Note on "An efficient approach for solving the lot-sizing problem with time-varying storage capacities".	European Journal of Operational Research	2011	DBLP DOI BibTeX RDF
1	Jan Christian Lang, Zuo-Jun Max Shen	Fix-and-optimize heuristics for capacitated lot-sizing with sequence-dependent setups and substitutions.	European Journal of Operational Research	2011	DBLP DOI BibTeX RDF
1	Horst Tempelmeier, Sascha Herpers	Dynamic uncapacitated lot sizing with random demand under a fillrate constraint.	European Journal of Operational Research	2011	DBLP DOI BibTeX RDF
1	Liang Lu, Xiangtong Qi	Dynamic lot sizing for multiple products with a new joint replenishment model.	European Journal of Operational Research	2011	DBLP DOI BibTeX RDF
1	Yiyong Xiao, Ikou Kaku, Qiuhong Zhao, Ren-qian Zhang	A reduced variable neighborhood search algorithm for uncapacitated multilevel lot-sizing problems.	European Journal of Operational Research	2011	DBLP DOI BibTeX RDF
1	Gürsel A. Süer, Bulent Erenay, Meng-Yun Chen	Analysis of evolutionary process in a lot sizing application.	Procedia CS	2011	DBLP DOI BibTeX RDF
1	Alistair R. Clark, Reinaldo Morabito, Eli A. V. Toso	Erratum to: Production setup-sequencing and lot-sizing at an animal nutrition plant through atsp subtour elimination and patching.	J. Scheduling	2011	DBLP DOI BibTeX RDF
1	António Aroso Menezes, Alistair Clark, Bernardo Almada-Lobo	Capacitated lot-sizing and scheduling with sequence-dependent, period-overlapping and non-triangular setups.	J. Scheduling	2011	DBLP DOI BibTeX RDF
1	Ik-Soo Shim, Hyeok-Chol Kim, Hyoung-Ho Doh, Dong-Ho Lee	A two-stage heuristic for single machine capacitated lot-sizing and scheduling with sequence-dependent setup costs.	Computers & Industrial Engineering	2011	DBLP DOI BibTeX RDF
1	Chung-Yuan Dye, Liang-Yuh Ouyang	A particle swarm optimization for solving joint pricing and lot-sizing problem with fluctuating demand and trade credit financing.	Computers & Industrial Engineering	2011	DBLP DOI BibTeX RDF
1	Devendra Choudhary, Ravi Shankar	Modeling and analysis of single item multi-period procurement lot-sizing problem considering rejections and late deliveries.	Computers & Industrial Engineering	2011	DBLP DOI BibTeX RDF
1	Yiyong Xiao, Ikou Kaku, Qiuhong Zhao, Ren-qian Zhang	A variable neighborhood search based approach for uncapacitated multilevel lot-sizing problems.	Computers & Industrial Engineering	2011	DBLP DOI BibTeX RDF
1	Yi Feng, Shaoxiang Chen, Arun Kumar, Bing Lin	Solving single-product economic lot-sizing problem with non-increasing setup cost, constant capacity and convex inventory cost in O(N log N) time.	Computers & OR	2011	DBLP DOI BibTeX RDF
1	Jörg Homberger	A generic coordination mechanism for lot-sizing in supply chains.	Electronic Commerce Research	2011	DBLP DOI BibTeX RDF
1	Debasis Das, Arindam Roy, Samarjit Kar	A volume flexible economic production lot-sizing problem with imperfect quality and random machine failure in fuzzy-stochastic environment.	Computers & Mathematics with Applications	2011	DBLP DOI BibTeX RDF
1	Marco Di Summa, Laurence A. Wolsey	Erratum: Lot-Sizing with Stock Upper Bounds and Fixed Charges.	SIAM J. Discrete Math.	2011	DBLP DOI BibTeX RDF
1	Morteza Rasti Barzoki, Morteza Jahanbazi, Mehdi Bijari	Effects of imperfect products on lot sizing with work in process inventory.	Applied Mathematics and Computation	2011	DBLP DOI BibTeX RDF
1	Hande Yaman	Erratum to: Polyhedral analysis for the two-item uncapacitated lot-sizing problem with one-way substitution [Discrete Appl. Math. 157 (2009) 3133-3151].	Discrete Applied Mathematics	2011	DBLP DOI BibTeX RDF
1	M.-C. Wu, L.-C. Huang, H.-M. Hsu, T.-S. Su	Multiple lot-sizing decisions in a two-stage production with an interrupted geometric yield and non-rigid demand.	JORS	2011	DBLP DOI BibTeX RDF
1	M. Narenji, S. M. T. Fatemi Ghomi, S. V. R. Nooraie	Grouping in decomposition method for multi-item capacitated lot-sizing problem with immediate lost sales and joint and item-dependent setup cost.	Int. J. Systems Science	2011	DBLP DOI BibTeX RDF
1	Laurent Deroussi, David Lemoine	Discrete Particle Swarm Optimization for the Multi-Level Lot-Sizing Problem.	Int. J. of Applied Metaheuristic Computing	2011	DBLP DOI BibTeX RDF
1	Guowei Hua, Han Qiao, Jian Li	Optimal Order Lot Sizing and Pricing with Carbon Trade.	ICEIS	2011	DBLP BibTeX RDF
1	Claudio Fabiano Motta Toledo, Márcio da Silva Arantes, Paulo Morelato França	Tabu search to solve the synchronized and integrated two-level lot sizing and scheduling problem.	GECCO	2011	DBLP DOI BibTeX RDF
1	Claudio Fabiano Motta Toledo, Renato Resende Ribeiro de Oliveira, Paulo Morelato França	A hybrid heuristic approach to solve the multi level capacitated lot sizing problem.	IEEE Congress on Evolutionary Computation	2011	DBLP DOI BibTeX RDF
1	Julia Pahl, Stefan Voß, David L. Woodruff	Discrete Lot-Sizing and Scheduling with Sequence-Dependent Setup Times and Costs Including Deterioration and Perishability Constraints.	HICSS	2011	DBLP DOI BibTeX RDF
1	Zhicong Zhang, Weiping Wang, Shouyan Zhong, Kaishun Hu	A solution to the capacitated lot sizing problem.	IEEM	2011	DBLP DOI BibTeX RDF
1	Zhili Zhou, Yongpei Guan	Stochastic lot-sizing problem with deterministic demands and Wagner-Whitin costs.	Oper. Res. Lett.	2010	DBLP DOI BibTeX RDF
1	Lauri Ahlroth, André Schumacher, Harri Haanpää	On the power of lookahead in online lot-sizing.	Oper. Res. Lett.	2010	DBLP DOI BibTeX RDF
1	H.-C. Hwang, Wikrom Jaruphongsa, Sila Çetinkaya, Chung-Yee Lee	Capacitated dynamic lot-sizing problem with delivery/production time windows.	Oper. Res. Lett.	2010	DBLP DOI BibTeX RDF
1	Rafael A. Melo, Laurence A. Wolsey	Uncapacitated two-level lot-sizing.	Oper. Res. Lett.	2010	DBLP DOI BibTeX RDF
1	Carina Maria Oliveira Pimentel, Filipe Pereira Alvelos, José Manuel Valério de Carvalho	Comparing Dantzig-Wolfe decompositions and branch-and-price algorithms for the multi-item capacitated lot sizing problem.	Optimization Methods and Software	2010	DBLP DOI BibTeX RDF