ZITO, R. System Safety Matrix Methods. Journal of System Safety, [S. l.], v. 52, n. 3, p. 13–21, 2017. DOI: 10.56094/jss.v52i3.119. Disponível em: https://jsystemsafety.com/index.php/jss/article/view/119. Acesso em: 25 oct. 2025.