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Geer, A.A.E. van der 2017.High incidence of cervical ribs indicates vulnerable condition in Late Pleistocene woolly rhinoceroses.PeerJ 5:e3684; DOI 10.7717/peerj.3684: 1-21.
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Geer, A.A.E. van der 2008.Animals in stone: Indian mammals sculptured through time (Rhinoceros unicornis, the Indian rhinoceros).Leiden, Boston: Brill (Handbook of Oriental Studies, section 2: India, vol. 21): pp. i-lxxii, 1-461 (380-386).