1. Luni-solar precession: determination from lunar laser ranges;Williams;Astron. Astrophys.,1991
2. Microwave and optical lunar transponders;Bender,1990
3. Cassini Ka-band precision Doppler and enhanced telecommunication system study;Riley,1990
4. Refraction in the troposphere;Elgered,1992
5. The ionosphere as a refractive medium;Th. Spoelstra,1992