MIKHAILETS, V. A.; MURACH, A. A. Elliptic boundary-value problem in a two-sided improved scale of spaces. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 60, n. 4, p. 497–520, 2008. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3172. Acesso em: 27 apr. 2025.