1. Facilities planning;Tompkins,2010
2. Design and control of warehouse order picking: A literature review;De Koster;European journal of operational research,2007
3. Order batching in multi-server pick-and-sort warehouses;Van Nieuwenhuyse;Katholieke Universiteit Leuven, Department of Decision Sciences and Information Management,2007
4. Ackerman, K.B. (1990). Practical Handbook of Warehousing, Van Nostrand Reinhold, New York, NY.
5. An evaluation of order picking policies for mail order companies;Petersen;Production and operations management,2000