Verma, Ram U. “Parametrically Sufficient Optimality Conditions for Multiobjective Fractional Subset Programming Relating to Generalized $(\eta, \rho, \theta)$-Invexity of Higher Order”. Journal of Informatics and Mathematical Sciences 5, no. 3 (December 30, 2013): 143–156. Accessed November 22, 2024. http://rgnpublications.com/journals/index.php/jims/article/view/221.