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https://amphibiaweb.org/cgi/amphib_query?where-genus=Salamandrella&where-species=keyserlingii.
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http://genomics.senescence.info/species/entry.php?species=Salamandrella_keyserlingii,.
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Kooijman, S. (2010).
Dynamic Energy Budget theory for metabolic organisation.
Cambridge Univ. Press, Cambridge.
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Ueda, H., Marunouchi, J., and Ochi, O. (2000).
Variation in age and size among breeding populations at different
altitudes in the Japanese newts, Cynops pyrrhogaster.
Amphibia-Reptilia, page 381–396. doi:10.1163/156853800507444.