TY  - RPRT
TI  - Exact perturbation theory for quantum-mechanical systems within boxes.
AU  - FM Fernández
AU  - EA Castro
PY  - 1992
DO  - 10.1103/physreva.46.7288
UR  - https://pubmed.ncbi.nlm.nih.gov/9908066/
ID  - 9908066
ER  -