Duality for a class of continuous-time homogeneous fractional programming problems. - G. Jailan Zalmai (Z. Oper. Research, 1986)

Generalized (ℱ, b, φ, ρ, θ)-univex n-set functions and global semiparametric sufficient efficiency conditions in multiobjective fractional subset programming. - G. J. Zalmai (Int. J. Math. Math. Sci., 2005)

Generalized (ℱ, b, ϕ, ρ, θ)-univex n-set functions and semiparametric duality models in multiobjective fractional subset programming. - G. J. Zalmai (Int. J. Math. Math. Sci., 2005)

Generalized (, b, ϕ, ρ, θ)-univex n-set functions and global parametric sufficient optimality conditions in minmax fractional subset programming. - G. J. Zalmai (Int. J. Math. Math. Sci., 2005)

Generalized (ℱ, b, ϕ, ρ, θ)-univex n-set functions and parametric duality models in minmax fractional subset programming. - G. J. Zalmai (Int. J. Math. Math. Sci., 2005)

Generalized (η, ρ)-Invex Functions and Global Semiparametric Sufficient Efficiency Conditions for Multiobjective Fractional Programming Problems Containing Arbitrary Norms. - G. J. Zalmai (J. Glob. Optim., 2006)

Generalized (η, ρ)-Invex Functions and Semiparametric Duality Models for Multiobjective Fractional Programming Problems Containing Arbitrary Norms. - G. J. Zalmai (J. Glob. Optim., 2006)

Second order (φ, ρ)-V-invexity and duality for semi-infinite minimax fractional programming. - Tadeusz Antczak; G. J. Zalmai (Appl. Math. Comput., 2014)