1. Arutyunov, A.V., Covering Mappings in Metric Spaces, and Fixed Points, Dokl. Akad. Nauk, 2007, vol. 416, no. 2, pp. 151–155.
2. Mordukhovich, B.S., Variational Analysis and Generalized Differentiation, Vol. 1, Springer, 2005.
3. Mordukhovich, B.Sh., Metody approksimatsii v zadachakh optimizatsii i upravleniya (Approximation Methods in Problems of Optimization and Control), Moscow: Nauka, 1988.
4. Arutyunov, A., Avakov, E., Gel’man, B., Dmitruk, A., and Obukhovskii, V., Locally Covering Maps in Metric Spaces and Coincidence Points, J. Fixed Points Theory Appl., 2009, vol. 5, no. 1, pp. 106–127.
5. Arutyunov, A.V., An Implicit Function Theorem without A Priori Assumptions About Normality, Zh. Vychisl. Mat. Mat. Fiz., 2006, vol. 6, no. 2, pp. 205–215.