D, B. S.; P, V. K. Digital Railway Ticketing Using Ethereum and Smart contracts. International Journal of Computer Engineering in Research Trends, [S. l.], v. 10, n. 4, p. 167–171, 2023. DOI: 10.22362/ijcert/2023/v10/i04/v10i0404. Disponível em: https://www.ijcert.org/index.php/ijcert/article/view/10. Acesso em: 13 may. 2026.