1. Invexity in optimization theory;Antczak,1998
2. T. Antczak, r-Invexity in Mathematical Programming, to be published.
3. (p,r)-Invex Sets and Functions;Antczak,1998
4. r-convex functions;Avriel;Math. Programming,1972
5. Nonlinear Programming: Theory and Algorithms;Bazaraa,1991