F. O. Umar, J. T. Oh, and A. S. Pamitran. “Two-Phase Flow Boiling Pressure Drop With R290 in Horizontal 3 Mm Diameter Mini Channel”. Journal of Advanced Research in Experimental Fluid Mechanics and Heat Transfer, vol. 4, no. 1, Dec. 2021, pp. 1-7, https://www.akademiabaru.com/submit/index.php/arefmht/article/view/4405.