BOUKOUCHA, R. Differential systems with algebraic and non-algebraic limit cycles explicitly given. Methods of Functional Analysis and Topology, [S. l.], v. 28, n. 2, p. 110–118, 2022. DOI: https://doi.org/10.31392/MFAT-npu26_2.2022.03. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/824. Acesso em: 13 dec. 2025.