S. C K, T. Nithya, and Y. . VSS, “OPTIMAL PRICING AND PRODUCTION LOT SIZE FOR TWO RATES OF PRODUCTION WITH PRICE-SENSITIVE DEMAND, PRICE BREAK-EVEN POINT, AND PROFIT MAXIMISATION IN HIGHER ORDER EQUATION”, S AFR J IND ENG, vol. 35, no. 1, pp. 115–136, May 2024.