Stüben, D, U Kramar, Z Berner, W Stinnesbeck, G Keller, and T Adatte. (2002) 2002. “Trace Elements, Stable Isotopes, and Clay Mineralogy of the Elles II K–T Boundary Section in Tunisia: Indications for Sea Level Fluctuations and Primary Productivity”. Palaeogeography, Palaeoclimatology, Palaeoecology 178 (3-4): 321-45. doi:10.1016/S0031-0182(01)00401-1.

Kramar, U, D üben, Z Berner, W Stinnesbeck, H Philipp, and G Keller. (2001) 2001. “Are Ir Anomalies Sufficient and Unique Indicators for Cosmic Events?”. Planetary and Space Science 49 (8): 831-37. doi:10.1016/S0032-0633(01)00036-8.

Stinnesbeck, W, P Schulte, F Lindenmaier, T Adatte, M Affolter, L Schilli, G Keller, et al. (2001) 2001. “Late Maastrichtian Age of Spherule Deposits in Northeastern Mexico: Implication for Chicxulub Scenario”. Canadian Journal of Earth Sciences 38 (2): 229-38. doi:10.1139/e00-061.