PERÄLÄ, A. General fractional derivatives and the Bergman projection. Annales Fennici Mathematici, [S. l.], v. 45, n. 2, p. 903–913, 2020. DOI: 10.5186/aasfm.2020.4531. Disponível em: https://afm.journal.fi/article/view/135891. Acesso em: 20 may. 2024.