Fritz john second-order duality for nonlinear programming. - Iqbal Husain; Norma G. Rueda; Z. Jabeen (Appl. Math. Lett., 2001)

Multiobjective Variational Programming under Generalized Type I Univexity. - Khadija Khazafi; Norma G. Rueda (J. Optimization Theory and Applications, 2009)

Sufficiency and duality for multiobjective control problems under generalized (B, rho)-type I functions. - Khadija Khazafi; Norma G. Rueda; Per Enflo (J. Glob. Optim., 2010)

Generalized invexity-type conditions in constrained optimization. - Shashi Kant Mishra; Norma G. Rueda (J. Syst. Sci. Complex., 2011)