Self-oscillations in a system with hysteresis: the small parameter approach Mikhail E. Semenov, Olga O. Reshetova, Sergey V. Borzunov and Peter A. Meleshenko Eur. Phys. J. Spec. Top., 230 18-20 (2021) 3565-3571 Published online: 28 July 2021 DOI: 10.1140/epjs/s11734-021-00237-3