1. F. W. Harris, Operations and cost, A. W. Shaw Company, Chicago (1915).
2. R. H. Wilson, Harv. Bus. Rev., 13, 116–128 (1934).
3. T. M. Whitin, “The theory of inventory management, 2nd edition”, Princeton University Press, Princeton (1957).
4. P.M. Ghare and G. F. Schrader, Journal of Industrial Engineering, 14, 238–243 (1963).
5. E. Naddor, Inventory systems. Wiley, New York (1966).