1. Lorenz , R. G. R. J. Helkey K. K. Abadi Global Positioning System Receiver Digital Processing Technique July 1992
2. Hatch , R. R. The Synergism of GPS Code and Carrier Measurements February 1982
3. Miniature Interferometer Terminals for Earth Surveying: Ambiguity and Multipath with the Global Positioning System;Counselman;IEEE Transactions in Geoscience and Remote Sensing,October 1981
4. Dynamic Positioning Using GPS Carrier Phase Measurements;Mader;Manuscripta Geodaetica,1986