Ives, H. E.; Stilwell, G. R. (1938). "An experimental study of the rate of a moving atomic clock". Journal of the Optical Society of America. 28 (7). s. 215. Bibcode:1938JOSA...28..215I. doi:10.1364/JOSA.28.000215.
Hasselkamp, D.; E. Mondry; A. Scharmann (1 Haziran 1979). "Direct observation of the transversal Doppler-shift". Zeitschrift für Physik A. 289 (2). ss. 151-155. Bibcode:1979ZPhyA.289..151H. doi:10.1007/BF01435932.
Ives, H. E.; Stilwell, G. R. (1938). "An experimental study of the rate of a moving atomic clock". Journal of the Optical Society of America. 28 (7). s. 215. Bibcode:1938JOSA...28..215I. doi:10.1364/JOSA.28.000215.
Hasselkamp, D.; E. Mondry; A. Scharmann (1 Haziran 1979). "Direct observation of the transversal Doppler-shift". Zeitschrift für Physik A. 289 (2). ss. 151-155. Bibcode:1979ZPhyA.289..151H. doi:10.1007/BF01435932.