Shukla, H. S., M. A. Siddiqui, and R. P. Tripathi. “Economic Order Quantity (EOQ) Model When the Demand Is Price and Time Sensitive Using Preservation Techniques”. Shanlax International Journal of Management, Vol. 5, no. 2, Oct. 2017, pp. 28-35, https://shanlaxjournals.in/journals/index.php/management/article/view/1725.