TY  - RPRT
TI  - Variational Principle for Eigenvalue Problems of Hamiltonian Systems
AU  - RD Benguria
AU  - MC Depassier
PY  - 1996
DO  - 10.1103/physrevlett.77.4482.2
UR  - https://pubmed.ncbi.nlm.nih.gov/10064540/
ID  - 10064540
ER  -