BROWN, A. K. Interferometric attitude determination using the Global Positioning System, A new gyrotheodlite. 3^<rd> Int. Geodetic Symp. On Satellite Positioning, Las Cruces, New Mexico, 1982. 1982, 1289-1302
KRUCZYNSKI, L. R. Using GPS to determine vehicle attitude. 2^<nd> Int. Tech. Meeting of the Satellite Division of the U.S. Inst. Of Navigation, Colorado Springs, Colorado, 1989. 1989, 163-171