CHEPURUKHINA, I. S.; MURACH, A. A. Elliptic problems in the sense of B. Lawruk on two-sided refined scales of spaces. Methods of Functional Analysis and Topology, [S. l.], v. 21, n. 1, p. 6–21, 2015. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/597. Acesso em: 18 dec. 2025.