Diddams S.A., D.J. Jones, J. Ye, S.T. Cundiff, J.K. Ranka, R.S. Windeler, and J.L. Hall, Ieee Transactions On Instrumentation And Measurement50, 552-555(2000).
Diddams S.A., D.J. Jones, J. Ye, S.T. Cundiff, J.L. Hall, J.K. Ranka, R.S. Windeler, R. Holzwarth, T. Udem, and T.W. Hänsch, Physical Review Letters84, 5102-5105(2000).