EGOROVA, I. The scattering problem for step-like Jacobi operator. Математическая физика, анализ, геометрия, Харків, Україна, v. 9, n. 2, p. 188–205, 2002. Disponível em: https://mag.ilt.kharkiv.ua/index.php/mag/article/view/m09-0188e. Acesso em: 25 лис. 2024.