TY  - RPRT
TI  - Projection operator in the boson expansion techniques.
AU  - J Dobe
AU  - SP Ivanova
AU  - RV Jolos
AU  - R Pedrosa
PY  - 1990
DO  - 10.1103/physrevc.41.1840
UR  - https://pubmed.ncbi.nlm.nih.gov/9966532/
ID  - 9966532
ER  -