IVASIUK, I. Ya. Generalized selfadjoinness of differentiation operator on weight Hilbert spases. Methods of Functional Analysis and Topology, [S. l.], v. 13, n. 4, p. 333–337, 2007. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/361. Acesso em: 16 dec. 2025.