ALRADDDADI, R. M. Natural Gas. JOURNAL OF ADVANCES IN MATHEMATICS, [S. l.], v. 11, n. 6, p. 5326–5332, 2015. DOI: 10.24297/jam.v11i6.1230. Disponível em: https://rajpub.com/index.php/jam/article/view/1230. Acesso em: 22 jul. 2024.