Tandian, N. P., A. Suwono, A. D. Pasek, T. Hardianto, T. A. Soelaiman, B. T. Prasetyo, S. Sarwono, and K. Kafi’uddin. “Performance Testing of Indonesian Hydrocarbon Refrigerants”. Mesin, vol. 14, no. 1, May 2017, pp. 19-23, https://journals.itb.ac.id/index.php/jtms/article/view/4842.