KUZHEL, S. A. On inverse problem in the Lax-Phillips scattering theory for a class of second-order operator-differential equations. Methods of Functional Analysis and Topology, [S. l.], v. 5, n. 2, p. 40–43, 1999. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/88. Acesso em: 17 dec. 2025.