R. DEEPA; T. SURENDIRAN; D. MICHAEL RAJ; S. SURESH. Some Properties of Spectral Theorem Over Hilbert Space. International Journal of Mathematics And its Applications, [S. l.], v. 7, n. 2, p. 49–50, 2019. Disponível em: http://ijmaa.in/index.php/ijmaa/article/view/246. Acesso em: 3 may. 2024.