Material Behavior in Plane Polyurethane-Polyurethane Impact with Velocities from 10 to 400 m/sec D. Tsukinovsky, E. Zaretsky et I. Rutkevich J. Phys. IV France, 07 C3 (1997) C3-335-C3-339 DOI: 10.1051/jp4:1997359