TY  - RPRT
TI  - Effective free energies.
AU  - H Büttner
AU  - N Flytzanis
PY  - 1987
DO  - 10.1103/physreva.36.3443
UR  - https://pubmed.ncbi.nlm.nih.gov/9899264/
ID  - 9899264
ER  -