Xu, X., Norell, M.A., Kuang, X., Wang, X., Zhao, Q. & Jia, C., 2004. Basal tyrannosauroids from China and evidence for protofeathers in tyrannosauroids. Nature 431, 7 Oct 2004: 680-684. ≡
|
Xu, X., Clark, J.M., Forster, C.A., Norell, M.A., Erickson, G.M., Eberth, D.A., Jia, C. & Zhao, Q., 2006. A basal tyrannosauroid dinosaur from the Late Jurassic of China. Nature 439, 9 Feb 2006: 715-718. ≡
|