1. Quasiconcave programming;Arrow;Econometrica,1961
2. Constraint qualifications in maximization problems;Arrow;Naval Res. Logistics Quart.,1961
3. R-convex functions;Avriel;Math. Programming,1972
4. Solutions of certain nonlinear programs involving r-convex functions;Avriel;J.O.T.A.,1973
5. Nonlinear programming — Analysis and Methods;Avriel,1976