@Misc{ BabLle22, author = { Babadjian, Jean-François and Llerena, Randy }, title = { Mixed boundary conditions as limits of dissipative boundary conditions in dynamic perfect plasticity }, journal = { Journal of Convex Analysis }, year = { 2022 }, pages = { 23 }, URL = { http://cvgmt.sns.it/paper/5447/ }, note = { cvgmt preprint} }