A general theory of dual optimization problems. II: On the perturbational dual problem corresponding to an unperturbational dual problem. - Ivan Singer (ZOR Methods Model. Oper. Res., 1989)

Multi-Order Convexity. - Juan Enrique Martínez-Legaz; Ivan Singer (Applied Geometry And Discrete Mathematics, 1990)

Subdifferentials with respect to dualities. - Juan Enrique Martínez-Legaz; Ivan Singer (Math. Methods Oper. Res., 1995)

On dualities between function spaces. - Ivan Singer (Math. Methods Oper. Res., 1996)

Global Error Bounds for Convex Multifunctions and Applications. - Wu Li; Ivan Singer (Math. Oper. Res., 1998)

Constraint Qualifications for Semi-Infinite Systems of Convex Inequalities. - Wu Li; Chandal Nahak; Ivan Singer (SIAM J. Optim., 2000)

Downward Sets and their separation and approximation properties. - Juan Enrique Martínez-Legaz; Alexander M. Rubinov; Ivan Singer (J. Glob. Optim., 2002)