1. J.J. Spilker Jr., B.W. Parkinson: Overview of GPS operation and design. In: Global Positioning System: Theory and Applications, (American Institute of Aeronautics and Astronautics, Washington 1996) p. 33
2. S. Schlamminger, K.-Y. Choi, T.A. Wagner, J.H. Gundlach, E.G. Adelberger: Test of the equivalence principle using a rotating torsion balance, Phys. Rev. Lett. 100, 041101 (2008)
3. N. Ashby, B. Bertotti: Relativistic effects in local inertial frames, Phys. Rev. D 34, 2246–2258 (1986)
4. R.A. Nelson: J., Math Phys. 28, 2379–2383 (1987)
5. R.A. Nelson: J., Math Phys. 35, 6224–6225 (1994)