1. Zeinab S. Safar: Wear, Vol. 86 (1983), pp.133-138.
2. Zhang Jianbin, Chi Changqing: Journal of Beijing University of Aeronautics and Astronautics, Vol. 23 (1997), pp.390-394.
3. Wang Changrui, Huang Qiubo, Duan Zhida: Heavy Machine, No. 6 (2002), pp.38-41.
4. Hu Xinhua, Yang Jilong, Jiang Wei: Heavy Machine, No. 11 (2003), pp.11-14.
5. Yu Xiao-dong, Meng Xiu-li, Wu Bo, et al: Key Engineering Materials, Vol. 419-420 (2010).