主题：【已应助】求助英文文献5篇，万分感谢

【序号】：1
【作者】：A. Yu. Ivantsov
【题名】：Small Vendian transversely Articulated fossils
【期刊】：Paleontological Journal
【年、卷、期、起止页码】：March–April 2007, Volume 41, Issue 2, pp 113-122
【全文链接】：http://link.springer.com/article/10.1134%2FS0031030107020013

【序号】：2
【作者】：Xiaoting Zhenga,b, Jingmai O’Connorc,1, Xiaoli Wanga, Min Wangc, Xiaomei Zhangb, and Zhonghe Zhouc
【题名】：On the absence of sternal elements in Anchiornis (Paraves) and Sapeornis (Aves) and the complex early evolution of the avian sternum
【期刊】：pnas.
【年、卷、期、起止页码】：Published online before print September 8, 2014, doi: 10.1073/pnas.1411070111
【全文链接】：http://www.pnas.org/content/early/2014/09/03/1411070111.abstract

【序号】：3
【作者】：Simon Conway Morris        & Jean-Bernard Caron
【题名】：A primitive fish from the Cambrian of North America
【期刊】：Nature 512
【年、卷、期、起止页码】：, 419–422 (28 August 2014) doi:10.1038/nature13414
【全文链接】：http://www.nature.com/nature/journal/v512/n7515/full/nature13414.html

【序号】：4
【作者】：Mallatt J1, Holland N.
【题名】：Pikaia gracilens Walcott: stem chordate, or already specialized in the Cambrian?
【期刊】：J Exp Zool B Mol Dev Evol.
【年、卷、期、起止页码】：2013 Jun;320(4):247-71. doi: 10.1002/jez.b.22500. Epub 2013 Apr 18.
【全文链接】：http://onlinelibrary.wiley.com/doi/10.1002/jez.b.22500/abstract

【序号】：5
【作者】：Marc Laflammea, , , Simon A.F. Darrochb, Sarah M. Tweedta, c, Kevin J. Petersond, Douglas H. Erwina, e
【题名】：The end of the Ediacara biota: Extinction, biotic replacement, or Cheshire Cat?
【期刊】：Gondwana Research
【年、卷、期、起止页码】：Volume 23, Issue 2, March 2013, Pages 558–573

【全文链接】：http://www.sciencedirect.com/science/article/pii/S1342937X1200353X

谢谢，万分感谢