Babar, M., M. A. Bustam, A. Ali, and A. S. Maulud. “Identification and Quantification of CO2 Solidification in Cryogenic CO2 Capture from Natural Gas”. International Journal of Automotive and Mechanical Engineering 15, no. 2 (June 1, 2018): 5367. Accessed October 17, 2019. http://journal.ump.edu.my/ijame/article/view/24.