1. Andrews, R. C. 1932.The New Conquest of Central Asia. The Natural History of Central Asia 1678New York: American Museum of Natural History.
2. Fang, X., Lu, L., Cheng, Z., Zou, Y., Pang, Q., Wang, Y., Chen, K., Yin, Z., Wang, X., Liu, J., Xie, H. and Jin, Y. 1998.On the Cretaceous Fossil Eggs of Xixia County, Henan Province125Beijing: Geological Publishing House.
3. Eggs and eggshell fragments from the Upper Cretaceous Two Medicine Formation of Montana