1. J. Hafele and R. Keating, “Around-the-World Atomic Clocks: Predicted Relativistic Time Gains,” Science, 177, 166–168 (1972).
2. R. Vessot and M. A. Levine, “Test of the Equivalence Principle Using a Space-Borne Clock,” Gen. Rel. Grav., 10, No. 3, 181–204 (1979).
3. L. B. Borisova and V. N. Melnikov, “Relativistic corrections to readings from a portable clock,” Izmer. Tekhn., No. 4, 13–15 (1988); Measur. Techn., 31, No. 4, 323–327 (1988).
4. V. F. Fateev, Relativistic Theory of Navigation and Timing, Mozhaiskii VKA, Leningrad (1988).
5. Yu. N. Medvedev and Yu. F. Smirnov, “Evaluating relativistic and gravitational corrections when moving transportable quantum clocks,” Metrology of Time and Space: Proc. 5th Russ. Symp., VNIIFTRI, Moscow (1994), pp. 342–343.