VASILIEV, S. V. An inverse spectral problem for Sturm-Liouville operators with singular potentials on arbitrary compact graphs. Tamkang Journal of Mathematics, [S. l.], v. 50, n. 3, p. 293–305, 2019. DOI: 10.5556/j.tkjm.50.2019.3356. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/3356. Acesso em: 5 may. 2024.