BOGDANSKII, Yu. V. Divergence theorem in the $L_2$ -version. Application to the Dirichlet problem. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 70, n. 5, p. 611–624, 2018. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1581. Acesso em: 5 dec. 2025.