CASAS-SÁNCHEZ, O. F.; GALEANO-PEÑALOZA, J.; RODRÍGUEZ-VEGA, J. J. $p$-Adic Markov process and the problem of the first return over balls. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 73, n. 7, p. 902–912, 2021. DOI: 10.37863/umzh.v73i7.464. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/464. Acesso em: 27 apr. 2025.