1. An, S.Q., J.F. Wang, F.J. Zeng, H.D. Zhang & B.S. Wang. 1999a. Biodiversity of tropical montane rain forest on Diaoluo Mountain, Hainan. Acta Scientiarum Naturalium Universitatis Sunyatseni 38(6): 78–83. (in Chinese with English abstract)
2. ———, X.L. Zhu, J.F. Wang, D.G. Campbell, G.Q. Li & X.L. Chen. 1999b. The plant species diversity in a tropical montane rain forest on Wuzhi Mountain, Hainan. Acta Ecologica Sinica 19: 803–809. (in Chinese with English abstract)
3. Beard, J. S. 1944. Climax vegetation in tropical America. Ecology 25: 127–158.
4. ———. 1955. The classification of tropical American vegetation types. Ecology 36: 359–412.
5. Cao, M. & J. H. Zhang. 1997. Tree species diversity of tropical forest vegetation in Xishuangbanna, SW China. Biodiversity and Conservation 6:995–1006.