ZUBKOVA, E. I.; ROFE-BEKETOV, F. S. Inverse scattering problem on the axis for the triangular $2\times 2$ matrix potential with a virtual level. Methods of Functional Analysis and Topology, [S. l.], v. 15, n. 4, p. 301–321, 2009. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/426. Acesso em: 16 dec. 2025.