Anderson, J.S. «The phylogenetic trunk: Maximal inclusion of taxa with missing data in an analysis of the Lepospondyli (Vertebrata, Tetrapoda)». Systematic Biology, 50, 2, 2001, pàg. 170–193. DOI: 10.1080/10635150119889. PMID: 12116927.
Ruta, M.; Coates, M.I. «Dates, nodes, and character conflict: addressing the lissamphibian origin problem». Journal of Systematic Palaeontology, 5, 2007, pàg. 69–122. DOI: 10.1017/S1477201906002008.
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Anderson, J.S. «The phylogenetic trunk: Maximal inclusion of taxa with missing data in an analysis of the Lepospondyli (Vertebrata, Tetrapoda)». Systematic Biology, 50, 2, 2001, pàg. 170–193. DOI: 10.1080/10635150119889. PMID: 12116927.
