CHEPURUKHINA, I. S.; MURACH, A. A. Elliptic Boundary-Value Problems in the Sense of Lawruk on Sobolev and Hörmander Spaces. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 67, n. 5, p. 672–691, 2015. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2014. Acesso em: 5 dec. 2025.