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- [21] OCCURRENCE OF NEGATIVE ABSORPTION IN A SECTION OF A DOPPLER-BROADENED LINE OPTICS AND SPECTROSCOPY-USSR, 1965, 18 (03): : 287 - &
- [23] Absorption mechanism in a four-level system Physical Review A - Atomic, Molecular, and Optical Physics, 2003, 67 (03): : 1 - 033816