TAVARES, W. de S. Phonecardoperated payphones in buses in Brazil. DAT Journal, [S. l.], v. 6, n. 3, p. 117–126, 2021. DOI: 10.29147/dat.v6i3.441. Disponível em: https://datjournal.anhembi.br/dat/article/view/441. Acesso em: 25 apr. 2024.