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)