TY  - RPRT
TI  - Violation of sum rules by random-phase-approximation surface response calculations based on a density-functional ground-state description.
AU  - A Liebsch
PY  - 1985
DO  - 10.1103/physrevb.32.6255
UR  - https://pubmed.ncbi.nlm.nih.gov/9936727/
ID  - 9936727
ER  -