STOROZH, O. G.; OLIIAR, Iu. I. On a criterion of mutual adjointness for extensions of some nondensely defined operators. Methods of Functional Analysis and Topology, [S. l.], v. 20, n. 1, p. 50–58, 2014. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/566. Acesso em: 18 dec. 2025.