GADJIEV, T. S.; MAMEDOVA, V. A. On removable sets of solutions of second-order elliptic and parabolic equations in nondivergent form. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 61, n. 11, p. 1485–1496, 2009. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3116. Acesso em: 5 dec. 2025.