TY  - RPRT
TI  - Quantum dynamics, metastable states, and contractive semigroups.
AU  - EC Sudarshan
PY  - 1992
DO  - 10.1103/physreva.46.37
UR  - https://pubmed.ncbi.nlm.nih.gov/9907833/
ID  - 9907833
ER  -