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Keller, Gerta, Howard Armstrong, Vicent Courtillot, David Harper, Michael Joachimski, Andrew Kerr, Norman MacLeod, William Napier, József Palfy, and Paul Wignall. 2012. “Volcanism, Impacts and Mass Extinctions (Long Version)”. London: The Geological Society. Referenced from www.geolsoc.org.uk: Volcanism, impacts and mass extinctions (Long Version).

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Tantawy, AAAM, Gerta Keller, and Alfonso Pardo. (2009) 2009. “Late Maastrichtian Volcanism in the Indian Ocean: Effects on Calcareous Nannofossils and Planktic Foraminifera”. Palaeogeography, Palaeoclimatology, Palaeoecology 284 (1-2): 63-87. doi:10.1016/j.palaeo.2009.08.025.