Dubey, Ramu, Deepmala, and Vishnu Narayan Mishra. 2020. “Higher-Order Symmetric Duality in Nondifferentiable Multiobjective Fractional Programming Problem over Cone Contraints”. Statistics, Optimization & Information Computing 8 (1), 187-205. https://doi.org/10.19139/soic-2310-5070-601.