TY  - RPRT
TI  - Resonance regions determined by a projection-operator formulation.
AU  - E Engdahl
AU  - E Brändas
PY  - 1988
DO  - 10.1103/physreva.37.4145
UR  - https://pubmed.ncbi.nlm.nih.gov/9899538/
ID  - 9899538
ER  -