%0 Journal Article %J Nature %D 2013 %T Vertebral architecture in the earliest stem tetrapods %A S.E. Pierce %A P.E. Ahlberg %A J.L. Molnar %A S. Sanchez %A P. Tafforeau %A J.R. Hutchinson %A J.A. Clack %B Nature %V 494 %P 226-229 %G eng %U http://www.nature.com/nature/journal/v494/n7436/full/nature11825.html