STEINMETZ, N. Complex Riccati differential equations revisited. Annales Fennici Mathematici, [S. l.], v. 39, n. 2, p. 503–511, 2014. DOI: 10.5186/aasfm.2014.3929. Disponível em: https://afm.journal.fi/article/view/135497. Acesso em: 7 apr. 2025.