СІРОКЛИН, І. М. Study of fare payment in metro from the point of view of automation problems. Eastern-European Journal of Enterprise Technologies, [S. l.], v. 2, n. 3(62), p. 15–18, 2012. DOI: 10.15587/1729-4061.2013.11708. Disponível em: https://journals.uran.ua/eejet/article/view/11708. Acesso em: 25 apr. 2024.