4.11: End of Chapter
The "airliner check" of time stretching (Section 4.10) is reported in J. C. Hafele and Richard E. Keating, Science , Volume 177, pages 166-167 and 168-170 (14 July 1972).
The "patrol plane" check of general relativity (Section 4.10) is reported by Carroll O. Alley in Quantum Optics, Experimental Gravity, and Measurement Theory , edited by Pierre Meystre and Marian O. Scully (Plenum, New York, 1983). See also 1976 physics Ph.D. theses by Robert A. Reisse and Ralph E. Williams, University of Maryland.
The "radioactive nuclei" check of time stretching (Section 4.10) is reported in R. V. Pound and G. A. Rebka, Jr., Physical Review Letters , Volume 4, pages 274-275 (1960).