Gertsch, B., G. Keller, T. Adatte, and D. Bartels. 2011. “Platinum Group Element (PGE) Geochemistry of Brazos Sections, Texas, U.S.A.”. In The End-Cretaceous Mass Extinction and the Chicxulub Impact in Texas, SEPM, Special Publication, No. 100:227-49. Tulsa: SEPM (Society for Sedimentary Geology).

Gertsch, B., G. Keller, T. Adatte, and D. Bartels. 2011. “Trace-Element Geochemistry of Brazos Sections, Texas, U.S.A.”. In The End-Cretaceous Mass Extinction and the Chicxulub Impact in Texas, SEPM, Special Publication, No. 100:251-79. Tulsa: SEPM (Society for Sedimentary Geology).

Keller, G., T. Abramovich, T Adatte, and Z. Berner. 2011. “Biostratigraphy, Age of Chicxulub Impact, and Depositional Environment of the Brazos River KTB Sequences”. In The End-Cretaceous Mass Extinction and the Chicxulub Impact in Texas, SEPM, Special Publication, No. 100:81-122. Tulsa: SEPM (Society for Sedimentary Geology).

Keller, G. 2011. “Cretaceous-Tertiary Mass Extinction in Marginal and Open Marine Environments: Texas, U.S.A., and Tunisia”. In The End-Cretaceous Mass Extinction and the Chicxulub Impact in Texas, SEPM, Special Publication, No. 100:197-226. Tulsa: SEPM (Society for Sedimentary Geology).