Chay, Zoya, Feruza Rakhimova, and Odila Islamova. “Application of the Lagrange Multiplier Method in Finding the Conditional Extremum of a Function of Two Variables”. MMIT Proceedings (November 10, 2025): 324–327. Accessed November 23, 2025. https://mmit.tiue.uz/index.php/journal/article/view/185.