Babahmed, M., El Amrani, A. and Lazaiz, S. 2020. Fixed points and diametral sets for sequentially bounded mappings in orbital ultrametric spaces. Proyecciones (Antofagasta, On line). 39, 2 (Apr. 2020), 481-493. DOI:https://doi.org/10.22199/issn.0717-6279-2020-02-0030.