Valliathal, M., and R. Uthayakumar. “A Study of Inflation Effects on an EOQ Model for Weibull Deteriorating Ameliorating Items With Ramp Type of Demand and Shortages”. Yugoslav Journal of Operations Research, vol. 23, no. 3, Oct. 2013, pp. 441-55, doi:10.2298/YJOR110830008V.