(en) Edward B. Daeschler, Jennifer A. Clack et Neil H. Shubin, « Late Devonian tetrapod remains from Red Hill, Pennsylvania, USA: how much diversity? », Acta Zoologica, vol. 90, , p. 306–317 (ISSN0001-7272, DOI10.1111/j.1463-6395.2008.00361.x)
(en) Walter L. Cressler, Edward B. Daeschler, Rudy Slingerland et Daniel A. Peterson, « Terrestrialization in the Late Devonian: a palaeoecological overview of the Red Hill site, Pennsylvania, USA », Geological Society, London, Special Publications, vol. 339, no 1, , p. 111–128 (ISSN0305-8719, DOI10.1144/SP339.10, lire en ligne)
(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) G. J. Retallack, R. R. Hunt et T. S. White, « Late Devonian tetrapod habitats indicated by palaeosols in Pennsylvania », Journal of the Geological Society, vol. 166, no 6, , p. 1143–1156 (ISSN0016-7649, DOI10.1144/0016-76492009-022, lire en ligne)
(en) Edward B. Daeschler, Jennifer A. Clack et Neil H. Shubin, « Late Devonian tetrapod remains from Red Hill, Pennsylvania, USA: how much diversity? », Acta Zoologica, vol. 90, , p. 306–317 (ISSN0001-7272, DOI10.1111/j.1463-6395.2008.00361.x)
(en) Walter L. Cressler, Edward B. Daeschler, Rudy Slingerland et Daniel A. Peterson, « Terrestrialization in the Late Devonian: a palaeoecological overview of the Red Hill site, Pennsylvania, USA », Geological Society, London, Special Publications, vol. 339, no 1, , p. 111–128 (ISSN0305-8719, DOI10.1144/SP339.10, lire en ligne)
(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) G. J. Retallack, R. R. Hunt et T. S. White, « Late Devonian tetrapod habitats indicated by palaeosols in Pennsylvania », Journal of the Geological Society, vol. 166, no 6, , p. 1143–1156 (ISSN0016-7649, DOI10.1144/0016-76492009-022, lire en ligne)
(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) G. J. Retallack, R. R. Hunt et T. S. White, « Late Devonian tetrapod habitats indicated by palaeosols in Pennsylvania », Journal of the Geological Society, vol. 166, no 6, , p. 1143–1156 (ISSN0016-7649, DOI10.1144/0016-76492009-022, lire en ligne)
(en) Walter L. Cressler, Edward B. Daeschler, Rudy Slingerland et Daniel A. Peterson, « Terrestrialization in the Late Devonian: a palaeoecological overview of the Red Hill site, Pennsylvania, USA », Geological Society, London, Special Publications, vol. 339, no 1, , p. 111–128 (ISSN0305-8719, DOI10.1144/SP339.10, lire en ligne)