Existence of regular solutions for a one-dimensional simplified perfect-plastic problem with a unilateral gradient constraint. Astruc, Thierry — 1997 Journal of Convex Analysis
Existence of regular solutions for a one-dimensional simplified perfect-plastic problem Thierry Astruc — 1995 ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique