BOGDANSKII, Yu. V. Dirichlet problem for the Poisson equation with an essentially infinite-dimensional elliptic operator. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 46, n. 7, p. 803–808, 1994. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5670. Acesso em: 6 dec. 2025.