1. GPR-History, trends, and future developments;Annan;Subsurface Sensing Technologies and Applications,2002
2. Impulse radar sounding in permafrost;Annan;Radio Science,1976
3. Radio echo sounding of polar ice sheets;Bailey;Nature,1964
4. Stratigraphic analyses using GPR;Baker;Geological Society of America Special Paper,2007
5. Application of ground-penetrating-radar methods in hydrogeologic studies;Beres;Ground Water,1991