TY  - JOUR
AU  - Björck, Åke
AU  - Yuan, J.Y.
TI  - Preconditioners for least squares problems by LU factorization
JO  - Electronic transactions on numerical analysis
PY  - 1999
SP  - 26
EP  - 35
VL  - 8
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/ETNA_1999__8__a7/
LA  - en
ID  - ETNA_1999__8__a7
ER  -