TY  - RPRT
TI  - Approach to density-functional ionization energy.
AU  - M Levy
AU  - A Görling
PY  - 1996
DO  - 10.1103/physrevb.53.969
UR  - https://pubmed.ncbi.nlm.nih.gov/9983531/
ID  - 9983531
ER  -