(en) J.A. Clack, Ahlberg, P.E., Blom, H. et Finney, S.M., « A new genus of Devonian tetrapod from North-East Greenland, with new information on the lower jaw of Ichthyostega », Palaeontology, vol. 55, no 1, , p. 73–86 (DOI10.1111/j.1475-4983.2011.01117.x)
(en) Marcello Ruta, Jonathan E. Jeffery et Michael I. Coates, « A supertree of early tetrapods », Proceedings of the Royal Society of London B: Biological Sciences, vol. 270, no 1532, , p. 2507–2516 (ISSN0962-8452, PMID14667343, PMCID1691537, DOI10.1098/rspb.2003.2524)
(en) Marcello Ruta, Jonathan E. Jeffery et Michael I. Coates, « A supertree of early tetrapods », Proceedings of the Royal Society of London B: Biological Sciences, vol. 270, no 1532, , p. 2507–2516 (ISSN0962-8452, PMID14667343, PMCID1691537, DOI10.1098/rspb.2003.2524)
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(en) Marcello Ruta, Jonathan E. Jeffery et Michael I. Coates, « A supertree of early tetrapods », Proceedings of the Royal Society of London B: Biological Sciences, vol. 270, no 1532, , p. 2507–2516 (ISSN0962-8452, PMID14667343, PMCID1691537, DOI10.1098/rspb.2003.2524)