Archibald, S. Bruce & Johnson, Kirk R. & Mathewes, Rolf W. & Greenwood, David R.: Intercontinental dispersal of giant thermophilic ants across the Arctic during early Eocene hyperthermals. Proceedings of the Royal Society B: Biological Sciences, 2011, 278. vsk, nro 1725, s. 3679–3686. doi:10.1098/rspb.2011.0729Artikkelin verkkoversio. Viitattu 3.12.2019. (englanniksi)
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Archibald, S. Bruce & Johnson, Kirk R. & Mathewes, Rolf W. & Greenwood, David R.: Intercontinental dispersal of giant thermophilic ants across the Arctic during early Eocene hyperthermals. Proceedings of the Royal Society B: Biological Sciences, 2011, 278. vsk, nro 1725, s. 3679–3686. doi:10.1098/rspb.2011.0729Artikkelin verkkoversio. Viitattu 3.12.2019. (englanniksi)