AL-ZANGANEE, Shlair Abdulkhaleq. Conversion to a Greener Fleet A Cost-Benefit Analysis of a Conversion to Compressed Natural Gas for a Municipal Bus Fleet. International Journal of Social Sciences & Educational Studies, [S. l.], v. 1, n. 2, p. 25–34, 2014. Disponível em: https://ijsses.tiu.edu.iq/index.php/ijsses/article/view/494. Acesso em: 14 jan. 2025.