Jiang, G., Chen, J., Pan, Y., Qin, T., Tong, Y., Wu, Q., & Xu, S. (1998). Problems and solutions in mathematics. Singapore: World Scientific Publishing Company.

Jiang, Guo-Ying, Ji-Xiu Chen, Yang-Lian Pan, Tie-Hu Qin, Yu-Sun Tong, Quan-Shui Wu, ja Sheng-Zhi Xu. Problems and Solutions in Mathematics. Singapore: World Scientific Publishing Company, 1998.

Jiang, Guo-Ying, et al. Problems and Solutions in Mathematics. Singapore: World Scientific Publishing Company, 1998.