TY  - RPRT
TI  - Invariants for time-dependent Hamiltonian systems.
AU  - J Struckmeier
AU  - C Riedel
PY  - 2001
DO  - 10.1103/physreve.64.026503
UR  - https://pubmed.ncbi.nlm.nih.gov/11497721/
ID  - 11497721
ER  -