New publication on Devonian
http://popups.ulg.ac.be/1374-8505/index.php?id=5574 .
LAGROU, D. & COEN-AUBERT, M. 2017. Update of the Devonian lithostratigraphic subdivision in the subsurface of the Campine Basin (northern Belgium). Geologica Belgica. 20/1-2: xx-xx.