@article {301626,
	title = {Vertebral architecture in the earliest stem tetrapods},
	journal = {Nature},
	volume = {494},
	year = {2013},
	pages = {226-229},
	url = {http://www.nature.com/nature/journal/v494/n7436/full/nature11825.html},
	author = {S.E. Pierce and P.E. Ahlberg and J.L. Molnar and S. Sanchez and P. Tafforeau and J.R. Hutchinson and J.A. Clack}
}
