Keyword "UNDERMINED AREAS" in:

PanGeo - Detection of vertical terrain movements using satellite radar data
Mišurec,J., Jelének,J.,Kopáčková,V., volume 47, 2014 (GRR for 2013), pages 69–73
pdf (2.43 MB)

Use of microgravity survey for the location of old mine workings (Horní Město, Horní Benešov)
Skácelová,Z., Blecha,V., Večeřa,J., volume 43, 2010 (GRR for 2009), pages 316–319
pdf (0.27 MB)