PIVOVARCHIK, V.; CHERNYSHENKO, A. Cospectral quantum graphs in the case of Dirichlet conditions at pendant vertices. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 75, n. 3, p. 382–396, 2023. DOI: 10.37863/umzh.v75i3.7351. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/7351. Acesso em: 5 dec. 2025.