Khalil, M. K. U., Akhtar, R., Akhtar, K., Khan, M., Shah, F., & Khattak, M. S. (2017). Modeling and Economic Analysis of Natural Gas Operated Air Conditioning System. Journal of the Pakistan Institute of Chemical Engineers, 45(1), JPIChE 45 (1) 2017 36–47. Retrieved from http://piche.org.pk/journal/index.php/jpiche/article/view/310