Liu, X., D. Yuan, S. Yang, and G. Lai. “OPTIMALITY CONDITIONS FOR (G, \alpha) INVEX MULTIOBJECTIVE PROGRAMMING”. Journal of Nonlinear Analysis and Optimization: Theory & Applications (JNAO), vol. 2, no. 2, Dec. 2011, pp. 305-1, https://ph03.tci-thaijo.org/index.php/jnao/article/view/2639.