References
Vonhof, H.B., Jagt, J.W.M., Immenhauser, A., Smit, J., van den Berg, Y.W., Saher, M., Keutgen, N. & Reijmer, J.J.G. 2011. Belemnite-based strontium, carbon and oxygen isotope stratigraphy of the type area of the Maastrichtian Stage. In: Jagt, J.W.M., Jagt-Yazykova, E.A. & Schins, W.J.H. (eds.), A tribute to the late Felder brothers – pioneers in Limburg geology and prehistoric archaeology. Netherlands Journal of Geosciences, 90: 259-270.