HAYAT, N.; MUGHAL, H. U.; NABIAND, H. Z.; MOEENUDDIN, G. Impact of Natural Gas and Biogas on Engine Lube Oil Condition. The Nucleus, [S. l.], v. 54, n. 2, p. 83–89, 2017. Disponível em: http://www.thenucleuspak.org.pk/index.php/Nucleus/article/view/58. Acesso em: 2 may. 2024.