WATSON, N. A. Mean values of subharmonic functions over Green spheres. Mathematica Scandinavica, Berkeley, CA, United States, v. 69, p. 307–319, 1991. DOI: 10.7146/math.scand.a-12382. Disponível em: https://journals.msp.org/mscand/article/view/1291. Acesso em: 24 jul. 2026.