Stephanie E. Pierce; Jennifer A. Clack; John R. Hutchinson. Three-dimensional limb joint mobility in the early tetrapod Ichthyostega. Nature. 2012, 486 (7404): 524–527. PMID 22722854. doi:10.1038/nature11124.
Stephanie E. Pierce; Jennifer A. Clack; John R. Hutchinson. Three-dimensional limb joint mobility in the early tetrapod Ichthyostega. Nature. 2012, 486 (7404): 524–527. PMID 22722854. doi:10.1038/nature11124.