1. Krasnoselskiî, M.A., Pokrovskiî, A.V.: Systems with hysteresis. Nauka, Moscow, 1983 (Russian)
2. Krejčí, P.: Hysteresis and periodic solutions of semilinear and quasilinear wave equations. Math. Z.193, 247–264 (1986)
3. Besov, O.V., Il'in, V.P., Nikolskiî, S.M.: Integral representations of functions and embedding theorems (Russian). Nauka, Moscow, 1975
4. Lions, J.L.: Quelques méthodes de résolution des problèmes aux limites non linéaires. Paris: Dunod-Gauthier-Villars 1969
5. Visintin, A.: On the Preisach model for hysteresis. Nonlinear Anal., Theory Methods Appl.8, 977–996 (1984)