1. R. Haines . Development of a drag-free control system. 14th Annual AIAA/USU Conference on Small Satellites, 2000.
2. Exospheric density measurements from the drag-free satellite Triad;Moe.;J. Geophys. Res.,1976
3. The TRIAD spacecraft;Dassoulas;APL Tech. Digest,1973
4. Gravity Probe B — testing einstein at the limits of engineering;Bencze;Nucl. Phys. B,2007
5. On-orbit performance of Gravity Probe B drag-free translation control and orbit determination;Li;Adv. Space Res.,2007