1. Avinadav, T. (2014). On real-time accounting of inventory costs in the newsvendor model and its effect on the service level. Journal of Service Science and Management, 7, 77–91.
2. Bazaraa, M. S., Sherali, H. D., & Shetty, C. M. (2006). Nonlinear programming, theory and algorithms. Hoboken, NJ: Wiley.
3. Chatfield, C., & Theobald, C. M. (1973). Mixtures and random sums. Journal of the Royal Statistical Society Series D, 22, 281–287.
4. Gallego, G. (1995). Lecture notes, Columbia University. http://www.columbia.edu/~gmg2/4000/pdf/lect_07.pdf .
5. Hadley, G., & Whitin, T. M. (1963). Analysis of inventory systems. Englewood Cliffs, NJ: Prentice-Hall.