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Mayr, Gerald (2008). "First substantial Middle Eocene record of the Lithornithidae (Aves): A postcranial skeleton from Messel (Germany)". Annales de Paléontologie. 94 (1): 29–37. Bibcode:2008AnPal..94...29M. doi:10.1016/j.annpal.2007.12.004.
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Zaher, H. & K.T. Smith (2020) Pythons in the Eocene of Europe reveal a much older divergence of the group in sympatry with boas. Biology Letters 16: 20200735. https://doi.org/10.1098/rsbl.2020.0735
eoearth.org
United Nations Environment Programme-World Conservation Monitoring Centre (Content Partner); Mark McGinley (Topic Editor). 2008. "Messel Pit fossil site, Germany." In: Encyclopedia of Earth. Eds. Cutler J. Cleveland (Washington, D.C.: Environmental Information Coalition, National Council for Science and the Environment). [First published in the Encyclopedia of Earth 29 November 2007; Last revised 8 July 2008; Retrieved 22 May 2009. Pit fossil site, Germany article
grube-messel.de
"Home". www.grube-messel.de (in German). Retrieved 13 May 2018.
Mayr, Gerald (2008). "First substantial Middle Eocene record of the Lithornithidae (Aves): A postcranial skeleton from Messel (Germany)". Annales de Paléontologie. 94 (1): 29–37. Bibcode:2008AnPal..94...29M. doi:10.1016/j.annpal.2007.12.004.
