Nguyen, M., and N. Hewitt. “The Prediction of Nominal and off-Design Characteristics of Economised Vapour Injection Scroll Compressor-Driven Heat Pump”. Journal of Research and Applications in Mechanical Engineering, vol. 1, no. 2, Oct. 2018, pp. 9-13, https://ph01.tci-thaijo.org/index.php/jrame/article/view/150176.