P Bultynck, J.-G Casier, M Coen, M Coen-Aubert, J Godefroid, P Sartenaer, and M Streel (1987)
Auxiliary stratotype for the Middle Devonian (Givetian) - Upper Devonian (Frasnian) boundary (Lower Polygnathus asymmetricus Zone) in the neritic facies on the southern flank of the Dinant Basin
Bulletin de la Société belge de Géologie, vol. Centenary Symposium Guidebook p. 1-41.
13574, 184, 185, 192, N, SYNDIN, GI, F, DEVSUP, DEVMOY, STRATBIO, PALMIC
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