Symmetric duality in non-differentiable programming using G-invexity. - Ramu Dubey; S. K. Gupta (Int. J. Math. Oper. Res., 2016)

Multi-objective Symmetric Fractional Programming Problem and Duality Relations Under (C, Gf, α , ρ , d)-Invexity over Cone Constraints. - Ramu Dubey; Teekam Singh; Vrince Vimal; Bhaskar Nautiyal (SoCPaR, 2019)

Multiobjective Fractional Symmetric Duality in Mathematical Programming with (C, Gf)-Invexity Assumptions. - Ramu Dubey; Lakshmi Narayan Mishra; Clemente Cesarano (Axioms, 2019)

Symmetric duality results for second-order nondifferentiable multiobjective programming problem. - Ramu Dubey; Vishnu Narayan Mishra (RAIRO Oper. Res., 2019)

Nondifferentiable G-Mond-Weir Type Multiobjective Symmetric Fractional Problem and Their Duality Theorems under Generalized Assumptions. - Ramu Dubey; Lakshmi Narayan Mishra; Luis Manuel Sánchez Ruiz (Symmetry, 2019)

New Class of K-G-Type Symmetric Second Order Vector Optimization Problem. - Chetan Swarup; Ramesh Kumar; Ramu Dubey; Dowlath Fathima (Axioms, 2023)

Non-differentiable second-order symmetric multiobjective fractional variational programming with cones constraints. - Ramesh Kumar; Vishnu Narayan Mishra; Ramu Dubey (RAIRO Oper. Res., 2024)