1673 20160222141732.0 10.1111/j.1365-246X.2004.02310.x DOI SISMOimport-201 Francis, Olivier 2004 Indication of the uplift of the Ardenne in long term gravity variations in Membach (Belgium) Van Camp, Michel van Dam, Tonie Warnant, René Hendrickx, Marc Geophysical Journal International 158 1 2004 346-352 published in REFERD