STEP (Satellite Test of the Equivalence Principle) - Sumner, TJ; Anderson, J; Blaser, J-P; Cruise, AM; Damour, T; Dittus, H; Everitt, CWF; Foulon, B; Jafry, Y; Kent, BJ; Lockerbie, N; Loeffler, F; et al. (ADV SPACE RES, 2007)