1. Mathematical Models of Hysteresis;Mayergoyz,1991
2. Systems with Hysteresis;Krasnosel'skiı˘,1989
3. Differential equations with hysteresis via a canonical example;Brokate,2003
4. Unbounded solutions of semilinear equations at resonance
5. W. Schmidt, Diophantine Approximations, Lecture Notes in Mathematics, vol. 785, Springer, New York, Berlin, 1980.