@article{834286, author = {J Ye and L Ma and John Hall}, title = {Sub-Doppler Optical Frequency Reference at 1.064 υm Via Ultrasensitve Cavity-Enhanced FM Spectroscopy of C2HD Overtone Transition}, year = {1996}, number = {Vo. 21}, month = {1996-12-01 00:12:00}, publisher = {Optics Letters}, language = {en}, }