TY  - RPRT
TI  - Surface impurity problem in the Hubbard model: A renormalization-group study.
AU  - AG Rojo
AU  - R Allub
AU  - MC Passeggi
PY  - 1989
DO  - 10.1103/physrevb.39.2685
UR  - https://pubmed.ncbi.nlm.nih.gov/9948516/
ID  - 9948516
ER  -