F. Jin, F.C. Zhang, Z.H. Li, J.Y. Zhang, C. Li et Z.H. Zhou, « On the horizon of Protopteryx and the early vertebrate fossil assemblages of the Jehol Biota », Chinese Science Bulletin, vol. 53, no 18, , p. 2820–2827 (DOI10.1007/s11434-008-0209-5)
O'Connor, J.K., Zhou Z. and Zhang F. (In press). "A reappraisal of Boluochia zhengi (Aves: Enantiornithes) and a discussion of intraclade diversity in the Jehol avifauna, China." Journal of Systematic Palaeontology, (published online before print 16 December 2010). DOI10.1080/14772019.2010.512614