1. Barker-Benfield , S. 2000 Extra dimension: professor-patented mapping device combines old, new. http://www.jacksonville.com/tu-online/stories/071200/bus_3519070.html
2. Benning , W. Aussems , T. 1998 Mobile mapping by a car driven survey system (CDSS) http://www.gia.rwth-aachen.de/Forschung/Strassen/CDSS/english/index.html
3. GPS and GIS map the nation's highway;Bossler;Geo Info Systems,1991