1. (p,r)-invex sets and functions;Antczak;Journal of Mathematical Analysis and Applications,2001
2. Relationships between pre-invex concepts;Antczak;Nonlinear Analysis,2005
3. r-pre-invexity and r-invexity in mathematical programming;Antczak;Computers and Mathematics with Applications,2005
4. An η-approximation method in mathematical programming problems;Antczak;Numerical Functional Analysis and Optimization,2004
5. T. Antczak, G-pre-invexity in mathematical programming, 2005 (in press)