BALBO, A.R., and S.P.B. PROENÇA. “On a Regularising Convex Potential Related to a Variational Formulation of an Elastoplastic-Damage Constitutive Model”. Trends in Computational and Applied Mathematics, vol. 3, no. 2, June 2002, pp. 25-34, doi:10.5540/tema.2002.03.02.0025.