TY  - RPRT
TI  - Quantum limits to light amplifiers.
AU  - MJ Collett
AU  - DF Walls
PY  - 1988
DO  - 10.1103/physrevlett.61.2442
UR  - https://pubmed.ncbi.nlm.nih.gov/10039119/
ID  - 10039119
ER  -