PIVOVARCHIK, V.; DUDKO, A. Inverse spectral problem for a star graph of Stieltjes strings with prescribed numbers of masses on the edges. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 73, n. 1, p. 47–60, 2021. DOI: 10.37863/umzh.v73i1.2398. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2398. Acesso em: 5 dec. 2025.