TY  - RPRT
TI  - Schwinger and anomaly-free Kohn variational principles and a generalized Lanczos algorithm for nonsymmetric operators.
AU  - H Meyer
AU  - J Horáek
AU  - LS Cederbaum
PY  - 1991
DO  - 10.1103/physreva.43.3587
UR  - https://pubmed.ncbi.nlm.nih.gov/9905446/
ID  - 9905446
ER  -