TY  - RPRT
TI  - Excitations in time-dependent density-functional theory.
AU  - H Appel
AU  - E K U Gross
AU  - K Burke
PY  - 2003
DO  - 10.1103/physrevlett.90.043005
UR  - https://pubmed.ncbi.nlm.nih.gov/12570418/
ID  - 12570418
ER  -