TY - JOUR AU - Svenja Knappe AU - R. Wynands AU - John Kitching AU - Hugh Robinson AU - Leo Hollberg C2 - Journal of the Optical Society of America B-Optical Physics DA - 2002-01-01 LA - en M1 - 18 PB - Journal of the Optical Society of America B-Optical Physics PY - 2002 TI - Characterization of coherent population-trapping resonances as atomic frequency references ER -