1. Kunqi Wang, Runxiao Wang, Binggao Yu and Changfu Zhang, International Technology and Innovation Conference. No. 11(2006), p.1494.
2. Lixin Cao, Hongji Wu and Jian Liu, Journal of Mechanical Engineering, Vol. 39(2003), No. 7, p.134.
3. Dexing Zheng, Kunqi Wang. Mechanical design and manufacturing, Vol. 6, No. 6(2009), p.184.
4. Liqun Lei, Kunqi Wang and Lirong Chen. Machinery Design & Manufacture. No. 10(2007), pp.1083-1084.
5. Zhixin Jia, Zhiyong Wang and Mingji Huang. Computer Engineering, Vol. 34 No. 6(2008), p.249.