( 2 peer reviewed ) split up filter- Louwye, S.; Van Grootel, G.; Verniers, J. (1992). The stratigraphy of the type locality of the ?Late Wenlock/Early Ludlow Mont Godart formation and the Early Ludlow Ronquières formation, Brabant Massif. Ann. Soc. géol. Belg. (1968) 115(1): 307-331, more
- Paepe, R.; Baeteman, C.; Mortier, R.; Vanhoorne, R.; Centre for Quaternary Stratigraphy (1981). The marine pleistocene sediments in the Flandrian area: A 'mise au point' on the nomenclature and stratotypes. Geol. Mijnbouw 60: 321-330, more
- Bogemans, F. (1994). Reconstruction of the sedimentary environments and lithostratigraphy of the lower Pleistocene deposits in the northern Campine area (Belgium), in: 2nd International Conference on the Geology of Siliciclastic Shelf Seas (southern North Sea and other examples), 24-28 May 1994, Gent: abstracts book. pp. 21-22, more
- Sommé, J.; Paepe, R.; Baeteman, C.; Beyens, L.; Cunat, N.; Geeraerts, R.; Hardy, A.F.; Hus, J.; Juvigné, E.; Mathieu, L.; Thorez, J.; Vanhoorne, R. (1978). La formation d'Herzeele: un nouveau stratotype du pleistocene moyen marin de la mer du Nord. Bull. Assoc. fr. étude quat. 15(54-55-56): 81-149, more
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