KUZHEL', S. A. On Conditions for the Applicability of the Lax–Phillips Scattering Scheme to the Investigation of an Abstract Wave Equation. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 55, n. 5, p. 621–630, 2003. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3938. Acesso em: 6 dec. 2025.