@misc{indiciaeca4d47910133,
  title = {Variational Principle for Eigenvalue Problems of Hamiltonian Systems},
  author = {RD Benguria and MC Depassier},
  year = {1996},
  doi = {10.1103/physrevlett.77.4482.2},
  url = {https://pubmed.ncbi.nlm.nih.gov/10064540/},
  note = {Source identifier: 10064540}
}