TY - JOUR AU - Yoon, T AU - Marian, A AU - Hall, J AU - Ye, J C2 - Physical Review A (Atomic, Molecular and Optical Physics) DA - 2001-02-01 LA - en M1 - 63 PB - Physical Review A (Atomic, Molecular and Optical Physics) PY - 2001 TI - Phase-Coherent Multilevel Two-Photon Transitions in Cold Rb Atoms: Ultrahigh-Resolution Spectroscopy Via Frequency-Stabilized ER -