D. Lagrou, N. Vandenberghe, S. Van Simaeys, and J. Hus. 2004. “Magnetostratigraphy and Rock Magnetism of the Boom Clay (Rupelian Stratotype) in Belgium”. Netherlands Journal of Geosciences 83 (September):209 -25. https://doi.org/10.1017/S001677460002028X.