KRAVCHENKO, A.; FESHCHENKO, B. Automorphisms of Kronrod-Reeb graphs of Morse functions on 2-torus. Methods of Functional Analysis and Topology, [S. l.], v. 26, n. 1, p. 88–96, 2020. DOI: https://doi.org/10.31392/MFAT-npu26_1.2020.07. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/747. Acesso em: 15 dec. 2025.