STEINMETZ, Norbert. A unified approach to the Painlevé transcendents. Annales Fennici Mathematici, [S. l.], v. 42, n. 1, p. 17–49, 2017. DOI: 10.5186/aasfm.2017.4203. Disponível em: https://afm.journal.fi/article/view/135647. Acesso em: 10 jan. 2026.