Liu, D., Chiappe, L. M., Zhang, Y., Bell, A., Meng, Q., Ji, Q. and Wang, X. (2014) “An advanced, new long-legged bird from the Early Cretaceous of the Jehol Group (northeastern China): insights into the temporal divergence of modern birds”, Zootaxa. Auckland, New Zealand, 3884(3), pp. 253–266. doi: 10.11646/zootaxa.3884.3.4.