Matei, Andaluzia, and Madalina Osiceanu. “A Variational Formulation Governed by Two Bipotentials for a Frictionless Contact Model”. Mathematical Modelling and Analysis 29, no. 1 (February 23, 2024): 109–124. Accessed July 18, 2024. https://journals.vilniustech.lt/index.php/MMA/article/view/17944.