Mössbauer Effect in in Molybdenum
R. L. Cohen
Phys. Rev. Lett. 30, 727 (1973) - Published 16 April, 1973
Narrow-Frequency Tunable -Ray Nuclear Resonances Induced by Laser Radiation
V. S. Letokhov
Phys. Rev. Lett. 30, 729 (1973) - Published 16 April, 1973