TY  - RPRT
TI  - Electron density-functional theory and x-ray structure factors.
AU  - M Levy
AU  - JA Goldstein
PY  - 1987
DO  - 10.1103/physrevb.35.7887
UR  - https://pubmed.ncbi.nlm.nih.gov/9941117/
ID  - 9941117
ER  -