Notes on Lipschitz estimates for the stop and play operator in plasticity. - Holger Lang; Klaus Dressler; René Pinnau; Michael Speckert (Appl. Math. Lett., 2009)

Nonsmooth Contact Dynamics for the large-scale simulation of granular material. - Jan Kleinert; Bernd Simeon; Klaus Dreßler (J. Comput. Appl. Math., 2017)