OMAORO, Sabasi. GENERALIZATIONS ON NORMAL SELF-ADJOINT OPERATORS. Journal of Global Research in Mathematical Archives(JGRMA), [S. l.], v. 4, n. 9, p. 13–17, 2017. Disponível em: https://jgrma.com/index.php/jgrma/article/view/319. Acesso em: 29 apr. 2025.