Jin F., Zhang F. C., Li Z. H., Zhang J. Y., Li C., Zhou Z. H. On the horizon of Protopteryx and the early vertebrate fossil assemblages of the Jehol Biota (англ.) // Chinese Science Bulletin[англ.] : journal. — 2008. — Vol. 53, no. 18. — P. 2820—2827. — doi:10.1007/s11434-008-0209-5.
Zhonghe Z. (2006). Evolutionary radiation of the Jehol Biota: chronological and ecological perspectives. Geol. J.41: 377—393. doi:10.1002/gj.1045.
Fucheng Z., Zhonghe Z. and Dyke G. (2006). Feathers and ‘feather-like’ integumentary structures in Liaoning birds and dinosaurs. Geol. J.41: 395—404. doi:10.1002/gj.1057.
Xiaoting Z., Zihui Z. and Lianhai H. (2007). A New Enantiornitine Bird with Four Long Rectrices from the Early Cretaceous of Northern Hebei, China. Acta Geologica Sinica81: 703—708. doi:10.1111/j.1755-6724.2007.tb00995.x.
He H. Y., Wang X. L., Jin F., Zhou Z. H., Wang F., Yang L. K., Ding X., Boven A., and Zhu R. X. (2006). The 40Ar/39Ar dating of the early Jehol Biota from Fengning, Hebei Province, northern China. Geochem. Geophys. Geosyst.7(4): Q04001. doi:10.1029/2005GC001083.
Jin F., Zhang F. C., Li Z. H., Zhang J. Y., Li C., Zhou Z. H. On the horizon of Protopteryx and the early vertebrate fossil assemblages of the Jehol Biota (англ.) // Chinese Science Bulletin[англ.] : journal. — 2008. — Vol. 53, no. 18. — P. 2820—2827. — doi:10.1007/s11434-008-0209-5.