KADUBOVSKY, A. A.; KLIMCHUK, A. V. Classification of $O$-topologically equivalent functions with color chord diagrams. Methods of Functional Analysis and Topology, [S. l.], v. 10, n. 3, p. 23–32, 2004. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/250. Acesso em: 18 dec. 2025.