1. Bank, B., J. Guddat, D. Klatte, B. Kummer, K. Tammer: Non-Linear Parametric Optimization. Akademie-Verlag, Berlin, 1982.
2. Ben-Tal, A., M. Teboulle, J. Zowe: Second-order necessary optimality conditions for semi-infinite optimization problems. In: R. Hettich, ed., Semi-Infinite Programming, Springer, Berlin-Heidelberg-New York, 1979.
3. Chaney, R.W.: Optimality conditions for piecewise C2 nonlinear programming. J. Optim. Theory Appl. 61 (1989) 179–202.
4. Clarke, F.: Optimization and Nonsmooth Analysis. Wiley, New York, 1983.
5. Darkhovskij, B.S. and E.S. Levitin: Quadratic optimality conditions for problems of semi-infinite mathematical programming. Trans. Moscow Math. Soc. 48 (1986) 175–225.