Referention
Verniers, J., Herbosch, A., Vanguestaine, M., Geukens, F., Delcambre, B., Pingot, J.-L., Belanger, I., Hennebert, M., Debacker, T., Sintubin, M. & De Vos, W., 2001. Cambrian-Ordovician-Silurian lithostratigraphical units (Belgium). In Bultynck & Dejonghe, eds., Guide to a revised stratigraphical scale of Belgium, Geologica Belgica, Brussels, 3, ***-***.