1. Davis JL, Rossiter JR, Mesher DE, Dawley CB. Quantitative measurement of pavement structures using radar. In: Proceedings of the 5th international conference on ground penetrating radar, Kitchener, Canada. Waterloo Center for Groundwater Research, 1994. p. 319–34.
2. GPR inspection of a mountain motorway in Switzerland;Hugenschmidt;J Appl Geophys,1998
3. Daniels DJ. Surface penetrating radar. London, UK: The Institution of Electrical Engineers, 1996.
4. Search for hidden chambers in the pyramids;Alvarez;Science,1970
5. Lane E. Modern-day explorers use muons to explore pyramids and volcanoes. AAAS News, 19 February 2005.