WATSON, N. Generalizations of the spherical mean convexity theorem on subharmonic functions. Annales Fennici Mathematici, [S. l.], v. 17, n. 2, p. 241–255, 1992. DOI: 10.5186/aasfm.1992.1733. Disponível em: https://afm.journal.fi/article/view/134755. Acesso em: 25 nov. 2024.