TY  - RPRT
TI  - Generalized gradient-expansion approximation for the exchange energy.
AU  - M Slamet
AU  - V Sahni
PY  - 1991
DO  - 10.1103/physrevb.44.10921
UR  - https://pubmed.ncbi.nlm.nih.gov/9999126/
ID  - 9999126
ER  -