1. Cho, Y. D., Si, J. M., Lee, K. C. and Han, C. S. (2004). Study of heat pump system for automotive. SAREK 2004 Winter Annual Conf., 2004-WQ-085, 536–541.
2. Lee, D. W., Oh, D. H. and Jee, Y. J. (2011). Investigation of R134a heat pump system or zero emission vehicle. KSAE Annual Conf. Proc., Korean Society of Automotive Engineers, KSAE11-A0107, 595–600.
3. Lee, J. J., Ahn, J. H., Woo, H. S., Kang, H. and Kim, Y. C. (2012). Heating performance characteristics of a heat pump system using waste heat in electric vehicles. SAREK 2012 Winter Annual Conf., 12-W-021, 86–89.
4. Meyer, J., Yang, G. and Papoulis, E. (2004). R134a heat pump for improved passenger comfort. SAE Paper No. 2004-01-1379.
5. Pomme, V. (1997). Reversible heat pump system for an electrical vehicle. SAE Paper No. 971772.