TY  - RPRT
TI  - Variational procedure for time-dependent processes.
AU  - R Englman
AU  - A Yahalom
PY  - 2004
DO  - 10.1103/physreve.69.026120
UR  - https://pubmed.ncbi.nlm.nih.gov/14995533/
ID  - 14995533
ER  -