Hall J.L., L.-S. Ma, M.S. Taubman, B. Tiemann, F.-L. Hong, O. Pfister, and J. Ye, Ieee Transactions On Instrumentation And Measurement48, 583-586(1999).
Hall J.L., M.S. Taubman, S.A. Diddams, B. Tiemann, J. Ye, L.-S. Ma, D.J. Jones, and S.T. Cundiff, inUnknown(World Scientific, Singapore, Innsbruck, Austria, 1999).
Williams R.M., J. Kelly, J.S. Hartman, S.W. Sharpe, M.S. Taubman, J.L. Hall, F. Capasso, C. Gmachl, D.L. Sivco, J.N. Baillargeon, and A.Y. Cho, Optics Letters24, 1844(1999).