Verma, R. U. (2013). 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(3), 143–156. https://doi.org/10.26713/jims.v5i3.221