ZAVOROTINSKYI, A. Nonlocal parameter-elliptic boundary value problems for general systems in complete scales of Banach spaces of distributions and their application. Methods of Functional Analysis and Topology, [S. l.], v. 8, n. 3, p. 90–96, 2002. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/196. Acesso em: 18 dec. 2025.