ILYASHENKO, Y. S. Covering manifolds for analytic families of leaves of foliations by analytic curves. Topological Methods in Nonlinear Analysis, [S. l.], v. 11, n. 2, p. 361–373, 1998. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.1998.023. Acesso em: 22 jul. 2024.