TY  - JOUR 
T1  - Density-functional based tight-binding: an approximate DFT method
JO  - Journal of the Brazilian Chemical Society
A1  - Oliveira, Augusto F.
A1  - Seifert, Gotthard
A1  - Heine, Thomas
A1  - Duarte, Hélio A.
SN  - 0103-5053
UL  - 10.1590/S0103-50532009000700002
VL  - 20 
Y1  - 2009
PB  - Brasil 
ER  -