1. Generalized gradients and applications;Clarke;Trans. Amer. Math. Soc.,1975
2. Lusternik theorem in theory of extremum;Dmitruk;Uspekhi Math. Nauk,1980
3. Semicontinuity in constrained optimization, Part 1;Dolecki;Control Cybernet.,1978
4. Semicontinuity in constrained optimization, Part 1b;Dolecki;Control Cybernet.,1978
5. Mathematical programming without differentiability;Halkin,1976