1. Ron Schad: Cranes Today Vol. 8 (1998), p.18~20.
2. Zhiwen Zhang, Yu Heqian, Jinnuo Wang and Qifan Bao: The Crane Design Manual (China Railway Publishing House, Beijing1997).
3. Desen Hu: Construction Machinery Technology and Management Vol. 2 (1993), p.7~9.
4. Yongming Shen: China Engineering Mechine Vol. 3 (2003), p.62~64.
5. Hao Xu: Machine Design Handbook(Mechanical Industry Press, Beijing 1992).