Topological classification of affine maps from $\mathbb{R}^2$ to $\mathbb{R}^2$. Neliniini Kolyvannya, [S. l.], v. 11, n. 4, p. 472–480, 2008. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/493. Acesso em: 21 jan. 2026.