1. Impact: Theory and Physical Behavior of Colliding Solids;Goldsmith,1960
2. Doubling of the oscillation period with c-continuous systems;Feigin;Prikl. Mat. Mekh.,1970
3. Introduction to Vibration of Mechanical Systems with Internal Impacts;Peterka,1981
4. Differential Equations with Discontinuous Right-hand Sides;Filippov,1998
5. Nonlinear dynamics of parts in engineering systems;Jerrelind;Chaos Soliton. Fract.,2000