TY  - GEN
AU  - Helgaker, Trygve  
AU  - Jorgensen, Poul
AU  - Olsen, Jeppe
TI  - Molecular Electronic–Structure Theory 
SN  - 9781118531471
PY  - 2013///
CY  - New York
PB  - John-Wiley & Sons ltd
KW  - Molecular Structures
N1  - Paperback
ER  -