Sarkar, T. “SENSITIVITY ANALYSIS FOR AN OPTIMAL CONTROL PROBLEM OF PRODUCTION SYSTEM BASED ON NONLINEAR CONSERVATION LAW”. Journal of Nonlinear Analysis and Optimization: Theory & Applications (JNAO), vol. 6, no. 1, May 2015, pp. 27-39, https://ph03.tci-thaijo.org/index.php/jnao/article/view/2767.