Sahani, Suresh, Deb Narayan Mandal, and Kameshwar Sahani. “A Certain Studies on Mathematical Modeling: An Optimization Oriented the Replacement of Items Whose Efficiency Deteriorates With Time”. Journal of Multidisciplinary Science: MIKAILALSYS 2, no. 1 (January 1, 2024): 1-12. Accessed July 5, 2024. https://ejournal.yasin-alsys.org/index.php/mikailalsys/article/view/2286.