DOMANOV, I. U. On cyclic and invariant subspaces of an operator $J\otimes B$ in the Sobolev spaces of vector functions. Methods of Functional Analysis and Topology, [S. l.], v. 5, n. 1, p. 1–12, 1999. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/78. Acesso em: 17 dec. 2025.