1. HuiBin-Wu, ShiLun-Gao. Internal Combustion Engineering, Vol. 24 (2003), p.56. In Chinese.
2. Tongqun-Han, Shenghua, Yao. Journal of Hubei Automotive Industries Institute. Vol. 19. (2005), p.6. In Chinese.
3. HongYun-Wang, RuiBin-Cai. Vehicle Engine. No. 171(2007), p.53. In Chinese.
4. HongYun-Wang. Journal of Guangdong University of Technology. 2009. 3: In Chinese.
5. XingXing-Wu. Wuhan University of Technology. 2010. 3: In Chinese.