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Keller, Gerta, Thierry Adatte, Gerald Baum, and Zsolt Berner. (2008) 2008. “Reply to ‘Chicxulub Impact Predates K–T Boundary: New Evidence from Brazos, Texas’ Comment by Schulte Et Al.”. Earth and Planetary Science Letters 269 (3-4): 621-29. doi:10.1016/j.epsl.2007.12.025.

Haydon, Mort, Thierry Adatte, Karl Föllmi, Gerta Keller, Philipp Steinmann, Virginie Matera, Zsolt Berner, and Doris Stüben. (2007) 2007. “Phosphorus and the Roles of Productivity and Nutrient Recycling During Oceanic Anoxic Event 2”. Geology 35 (6): 483. doi:10.1130/G23475A.1.