1. Krasnoselskii, M. (1956): Topological Methods in the Theory of Nonlinear Integral Equations. Gostehizdat, Moscow (Russian). ( English edition: McMillan, New York, 1964 ).
2. Krasnoselskii, M. et al. (1966): Integral Operators in Spaces of Summable Functions. Nauka, Moscow (Russian). (English edition: Noordhoff, Leyden, 1976.)
3. Zabreiko, P. and Krasnoselskii, M. (1975): Integral Equations. Noordhoff, Leyden.
4. Vainberg, M. (1956): Variational Methods for the Study of Nonlinear Operators. Gostehizdat, Moscow (Russian). (English edition: Holden Day, San Francisco, CA, 1964.)
5. Vainberg, M. (1972): The Variational Method and the Method of Monotone Operators. Nauka, Moscow (Russian). (English edition: Monotone Operators, Wiley, New York, 1973.)