1. Chui Shunchang. 1985. Characteristics of Shaanxi forest plant flora [J]. Shaanxi Forestry Science and Technology, (1): 8–10.
2. Nanjiing College of Forest Product Industry. 1980. Genetic Breeding [M]. Beijing: Science Press, p5–13
3. Xu Shuwen. 2000. Resource of tree species quality and division of Shaanxi Province [M]. Beijing: China Forestry Publishing House. p125–123.
4. Zhang Xinbo. 1993. A Preliminary Investigation into Natural Types ofPinus tablaeformis Seed Forest [J]. Shaanxi Forestry Science and Technology, (4): 10–12