1. V. M. Alekseev, V. M. Tikhomirov, and S. V. Fomin, Optimal Control (Fizmatlit, Moscow, 2007) [in Russian].
2. F. P. Vasiliev, Optimization Methods, Vol. 1 (MTsNMO, Moscow, 2011) [in Russian].
3. A. V. Arutyunov, “Smooth abnormal problems in extremum theory and analysis,” Russian Math. Surveys 67 (3), 403–457 (2012).
4. D. Klatte and B. Kummer, Nonsmooth Equations in Optimization. Regularity, Calculus, Methods and Applications (Kluwer, Dordrecht, 2002).
5. J. F. Bonnans and A. Shapiro, Perturbation Analysis of Optimization Problems (Springer, New York, 2000).