Nikolskiy, P.A.; Sulerzhitsky, L.D.; Pitulko, V.V. (2011). „Last straw versus Blitzkrieg overkill: Climate-driven changes in the Arctic Siberian mammoth population and the Late Pleistocene extinction problem”. Quaternary Science Reviews. 30 (17–18): 2309—2328. Bibcode:2011QSRv...30.2309N. doi:10.1016/j.quascirev.2010.10.017.
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Nikolskiy, P.A.; Sulerzhitsky, L.D.; Pitulko, V.V. (2011). „Last straw versus Blitzkrieg overkill: Climate-driven changes in the Arctic Siberian mammoth population and the Late Pleistocene extinction problem”. Quaternary Science Reviews. 30 (17–18): 2309—2328. Bibcode:2011QSRv...30.2309N. doi:10.1016/j.quascirev.2010.10.017.