ISWANTO, Ary Putra; IMRON, Nanda Ahda; PRIYANTO, Sapto. Analysis of Understanding and Violation of the Early Warning System (EWS) on Accident Rates at Level Crosses with the Chi-Square Method. Jurnal Perkeretaapian Indonesia (Indonesian Railway Journal), [S. l.], v. 5, n. 1, p. 10–17, 2021. DOI: 10.37367/jpi.v5i1.133. Disponível em: https://jurnal.ppi.ac.id/jpi/article/view/133. Acesso em: 4 jun. 2026.