KOSHMANENKO, V. D.; DUDKIN, M. E. Nonzero capacity sets and dense subspaces in scales of Sobolev spaces. Methods of Functional Analysis and Topology, [S. l.], v. 20, n. 3, p. 213–218, 2014. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/580. Acesso em: 16 dec. 2025.