Rauschenberger J., T.M. Fortier, D.J. Jones, J. Ye, and S.T. Cundiff, Optics Express 11, 1345 (2003).
Rauschenberger J., T.M. Fortier, D.J. Jones, J. Ye, and S.T. Cundiff, Optics Express 10, 1404 (2002).