Hou L H,Liu Z C.A new fossil bird from Lower Cretaceous of Gansu and early evolution of birds[J].Scient.Sin.(Ser.B),1984,27:1296-1302.
[2]
Zhou Z H,Hou L H.The discovery and study of Mesozoic birds in China[A].In:Chiappe L M,Witmer L M eds.Mesozoic Birds:Above the Heads of Dinosaurs[C].Berkeley:Univ.California Press,2002.160-183.
[3]
Bureau of Geology and Mineral Resoutces of Gansu Province.Regional Geology of Gansu Province[M].Beijing:Geological Publishing House,1989.
[4]
You H L,O\\'Connor J,Chiappe L M,et al.A new fossil bird from the Early Cretaceous of Gansu Province,northwestern China[J].Hist.Biol.,2005,17:7-14.
[5]
Harris J D,Lamanna M C,You H L,et al.A second enantiornithean (Aves:Omithothoraces) wing from the Early Cretaceous Xiagou Formation near Changma,Gansu Province,People\\'s Republic of China[J].Can.J.Earth Sci.,2006,43:547-554.
[6]
Chen P J.Distribution and spread of the Jehol Biota[J].Palaeoworld,1999,11:1-6.
