KUPKA, I. Measurability of similar functions. Annales Fennici Mathematici, [S. l.], v. 42, n. 2, p. 803–808, 2017. DOI: 10.5186/aasfm.2017.4246. Disponível em: https://afm.journal.fi/article/view/135694. Acesso em: 14 apr. 2025.