1. Dynamics of mechanisms with elastic connections and impact systems;Kobrinskii,1969
2. Doubling of the oscillation period with c-continuous systems;Feigin;Prikl Mat Mekh,1970
3. Differential equations with discontinuous right-hand sides;Filippov,1988
4. Introduction to vibration of mechanical systems with internal impacts;Peterka,1981
5. A periodically forced piecewise linear oscillator;Shaw;J Sound Vibr,1983