KANGUZHIN, B.; ZHAPSARBAYEVA, L.; MADIBAIULY, Z. Lagrange formula for differential operators and self-adjoint restrictions of the maximal operator on a tree . Eurasian Mathematical Journal, [S. l.], v. 10, n. 1, 2024. Disponível em: https://emj.enu.kz/index.php/main/article/view/137. Acesso em: 3 apr. 2025.