Protopteryx (Spanish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Protopteryx" in Spanish language version.

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Zhang, Fucheng; Zhou, Zhonghe (2000). «A Primitive Enantiornithine Bird and the Origin of Feathers». Science 290 (5498): 1955-1959. PMID 11110660. doi:10.1126/science.290.5498.1955.
Jin, F.; Zhang, F.C.; Li, Z.H.; Zhang, J.Y.; Li, C.; Zhou, Z.H. (2008). «On the horizon of Protopteryx and the early vertebrate fossil assemblages of the Jehol Biota». Chinese Science Bulletin 53 (18): 2820-2827. doi:10.1007/s11434-008-0209-5.
O'Connor, J.K., Zhou Z. and Zhang F. (2011). "A reappraisal of Boluochia zhengi (Aves: Enantiornithes) and a discussion of intraclade diversity in the Jehol avifauna, China." Journal of Systematic Palaeontology, Volume 9, Issue 1 pages 51-63 (published online before print 16 December 2010). doi 10.1080/14772019.2010.512614

Zhang, Fucheng; Zhou, Zhonghe (2000). «A Primitive Enantiornithine Bird and the Origin of Feathers». Science 290 (5498): 1955-1959. PMID 11110660. doi:10.1126/science.290.5498.1955.