Casas-Sánchez, O. F., J. Galeano-Peñaloza, and J. J. Rodríguez-Vega. 2021. “$p$-Adic Markov Process and the Problem of the First Return over Balls”.
Ukrains’kyi Matematychnyi Zhurnal
73 (7): 902-12.
https://doi.org/10.37863/umzh.v73i7.464
.