KAIMANOVICH, V. A. Hopf decomposition and horospheric limit sets. Annales Fennici Mathematici, [S. l.], v. 35, n. 2, p. 335–350, 2010. DOI: 10.5186/aasfm.2010.3522. Disponível em: https://afm.journal.fi/article/view/135312. Acesso em: 14 apr. 2025.