Double-Mode Method of Sub-Doppler Spectroscopy and Its Application in Laser Frequency Stabilization Basov, N. G. ; Gubin, M. A. ; Nikitin, V. V. ; Nikulchin, A. V. ; Tyruikov, D. A. ; Petrovskiy, V. N. ; Protscenko, E. D. Abstract Publication: Precision Measurement and Fundamental Constants Pub Date: August 1981 Bibcode: 1981pmfc.conf...65B