TY - JOUR AU - John Kitching AU - Leo Hollberg AU - Svenja Knappe AU - R. Wynands C2 - Optics Letters DA - 2001-01-01 LA - en M1 - 26 PB - Optics Letters PY - 2001 TI - Frequency-Dependent Optical Pumping Effects in Driven, Three-Level Systems ER -