WATSON, N. A. Mean values of subharmonic functions over Green spheres. MATHEMATICA SCANDINAVICA, [S. l.], v. 69, p. 307–319, 1991. DOI: 10.7146/math.scand.a-12382. Disponível em: https://www.mscand.dk/article/view/12382. Acesso em: 14 apr. 2025.