Aho, A. V., Hopcroft, J. E., and Ullman, J. D. (1983). Data Structures and Algorithms. Reading, MA: Addison-Wesley.
Burlew, M. M. (1998). SAS Macro Programming Made Easy. Cary, NC: SAS Institute Inc.
Cox, J. F., III, and Blackstone, J. H., Jr., eds. (1998). APICS Dictionary. 9th ed. Alexandria, VA: APICS.
Landvater, D. V., and Gray, C. D. (1989). MRP II Standard System: A Handbook for Manufacturing Software Survival. New York: John Wiley & Sons.
Plossl, G. (1995). Orlicky’s Material Requirements Planning. 2nd ed. New York: McGraw-Hill.