C. Rolf, U. Hambach, and M. Weidenfeller. “Rock and Palaeomagnetic Evidence for the Plio-Pleistocene Palaeoclimatic Change Recorded in Upper Rhine Graben Sediments (Core Ludwigshafen-Parkinsel)”. Netherlands Journal of Geosciences, vol. 87, Mar. 2008, pp. 41 -50, doi:10.1017/S0016774600024033.