Boundary-value problems for the evolutionary Schrödinger equation. I. Neliniini Kolyvannya, [S. l.], v. 22, n. 2, p. 235–249, 2019. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/947. Acesso em: 21 jan. 2026.