@article{702351,
     title = {Stable periodic oscillations in systems with monotonous hysteresis nonlinearity},
     booktitle = {Equadiff 7},
     series = {GDML\_Books},
     publisher = {BSB B.G. Teubner Verlagsgesellschaft},
     address = {Leipzig},
     year = {1990},
     pages = {92-95},
     zbl = {0718.34076},
     url = {http://dml.mathdoc.fr/item/702351}
}

Krasnoselsky, M. A.; Pokrovsky, A. V.; Semenov, M. E. Stable periodic oscillations in systems with monotonous hysteresis nonlinearity, dans Equadiff 7, GDML_Books,  (1990), pp. 92-95. http://gdmltest.u-ga.fr/item/702351/