1. Hou, L. H., Zhou, Z. H., Gu, Y. C.et al., First discovery of the Jurassic birds in China,Chinese Science Bulletin (in Chinese), 1995, 40(8): 726.
2. Chen, P. J., Dong, Z. M., Zhan, S. N., An exceptionally well-preserved theropod dinosaur from the Yixian Formation of China,Nature, 1997(in press).
3. Zhou, Z. Y., Jurassic floras,Fossil Floras of China Through the Geological Ages, Guangzhou: Guangdong Science and Technology Press, 1995.
4. Sun, G., Guo, S. X., Zheng, S. L. etal., First discovery of the earliest angiospermous megafossil flora in the world,Sci. in China (in Chinese), Ser. B, 1993, (5): 543.
5. Blanc-Louvel, C., Le genre “Ranunculus L.” dans le Berriasien (Crétace Inf.) de la province de Lérida (Espagne),Ilerda, 1984, 45: 83.