SOROKA, Yu. Yu.; SHARKO, V. V. Topological equivalence to a projection. Methods of Functional Analysis and Topology, [S. l.], v. 21, n. 1, p. 3–5, 2015. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/596. Acesso em: 16 dec. 2025.