TY  - RPRT
TI  - Excited-state forces within a first-principles Green's function formalism.
AU  - Sohrab Ismail-Beigi
AU  - Steven G Louie
PY  - 2003
DO  - 10.1103/physrevlett.90.076401
UR  - https://pubmed.ncbi.nlm.nih.gov/12633253/
ID  - 12633253
ER  -