Fröbisch, Jörg; Reisz, Robert R. (2009). "The Late Permian herbivore Suminia and the early evolution of arboreality in terrestrial vertebrate ecosystems". Proceedings of the Royal Society B. 276 (1673). ss. 3611-3618. doi:10.1098/rspb.2009.0911. PMC2817304 $2. PMID19640883.
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Fröbisch, Jörg; Reisz, Robert R. (2009). "The Late Permian herbivore Suminia and the early evolution of arboreality in terrestrial vertebrate ecosystems". Proceedings of the Royal Society B. 276 (1673). ss. 3611-3618. doi:10.1098/rspb.2009.0911. PMC2817304 $2. PMID19640883.