Upadhyay, B.B., T. Antczak, S.K. Mishra, and K. Shukla. 2022. “Nondifferentiable Generalized Minimax Fractional Programming under (Ф,ρ)-Invexity”. Yugoslav Journal of Operations Research 32 (1):3-27. https://doi.org/10.2298/YJOR200915018U.