Boundary-value problems for the evolutionary Schrödinger equation. II. Neliniini Kolyvannya, [S. l.], v. 22, n. 4, p. 439–457, 2019. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/961. Acesso em: 21 jan. 2026.