1. Quill , LCDR John , USCG U.S. Coast Guard Differential GPS System Development Proceedings of the RTCM Annual Meeting, April 29-May 1 1986
2. RTCM SC-104 Recommended Pseudolite Signal Specification;Stansell;Navigation,Spring 1986
3. Kalafus , R. M. Knable , N. Kraemer , J. Vilcans , J. NAVSTAR GPS Simulation and Analysis Program , Technical Report No. DOT-TSC-RSPA-83-11 December 1983