El-Shafeiy, M., A. El-Kammar, A. El-Barkooky, and P. Meyers,
"Paleo-Redox Depositional Conditions Inferred from Trace Metal Accumulation in Two Cretaceous-Paleocene Organic-Rich Sequences from Central Egypt",
Marine and Petroleum Geology, vol. 73, pp. 333-349, 2016.