CHIVU COJOCARU, Mariana; MATEI, Andaluzia. Weak solutions via two-field Lagrange multipliers for boundary value problems in mathematical physics. Mathematical Modelling and Analysis, [S. l.], v. 27, n. 4, p. 561–572, 2022. DOI: 10.3846/mma.2022.15827. Disponível em: https://journals.vilniustech.lt/index.php/MMA/article/view/15827. Acesso em: 22 may. 2025.