Continuous review (s, S) inventory system with random lifetimes and positive leadtimes. - S. Kalpakam; K. P. Sapna (Oper. Res. Lett., 1994)

A perishable inventory system with modified (S-1, S) policy and arbitrary processing times. - S. Kalpakam; S. Shanthi (Comput. Oper. Res., 2001)

A continuous review perishable system with renewal demands. - S. Kalpakam; S. Shanthi (Ann. Oper. Res., 2006)

The value of information sharing in a serial supply chain with AR(1) demand and non-zero replenishment lead times. - Devarajulu Sabitha; Chandrasekharan Rajendran; S. Kalpakam; Hans Ziegler (Eur. J. Oper. Res., 2016)