STOROZH, O. G.; PIPA, H. M. The criteria of maximal dissipativity and self-adjointness for a class of differential-boundary operators with bounded operator coefficients. Methods of Functional Analysis and Topology, [S. l.], v. 14, n. 4, p. 372–379, 2008. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/400. Acesso em: 18 dec. 2025.