Κεφάλι: Διαφορά μεταξύ των αναθεωρήσεων

<ref name="jandzik2014">{{cite journal | doi = 10.1038/nature14000| title = Evolution of the new vertebrate head by co-option of an ancient chordate skeletal tissue| journal = Nature| year = 2014| last1 = Jandzik | first1 = D. | last2 = Garnett | first2 = A. T. | last3 = Square | first3 = T. A. | last4 = Cattell | first4 = M. V. | last5 = Yu | first5 = J. K. | last6 = Medeiros | first6 = D. M. | volume=518 | pages=534–537}} ''For laysummary see:'' {{cite journal | journal=[[Nature (journal)|Nature]] | department=Research | page=171 | type=paper | date=11 December 2014 | title=Evolution: How vertebrates got a head | volume=516 | issue=7530 }}</ref>

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