↑ Ivanov, M., Hrdlickova, S. & Gregorova, R. (2001) The Complete Encyclopedia of Fossils. Rebo Publishers, Netherlands. pp. 312
↑ Xu, X.; Norell, M.A. (2006). “Non-Avian dinosaur fossils from the Lower Cretaceous Jehol Group of western Liaoning, China”. Geological Journal 41: 419–437. doi:10.1002/gj.1044.
