PRES, J. Positive harmonic functions on comb-like domains. Annales Fennici Mathematici, [S. l.], v. 36, n. 2, p. 577–591, 2011. DOI: 10.5186/aasfm.2011.3630. Disponível em: https://afm.journal.fi/article/view/135368. Acesso em: 11 apr. 2025.