A GPS and GSM-Based Rail Crack Detection System . INTERNATIONAL JOURNAL OF ADVANCED RESEARCH AND REVIEW (IJARR), [S. l.], v. 3, n. 1, p. 77–82, 2018. Disponível em: https://www.ijarr.org/index.php/ijarr/article/view/32.. Acesso em: 22 sep. 2026.