rajab, najlaa. “Quantum-Chemical Modelling of Clusters NH3· (Н2О) N, Forming in Processes of Gas and Oil - Refining Industry.”. Journal of Petroleum Research and Studies 2, no. 1 (February 1, 2011): 26-41. Accessed May 17, 2024. https://jprs.gov.iq/index.php/jprs/article/view/31.