@misc{indiciaee0120087c4fe,
  title = {Variational principle for confined quantum systems.},
  author = {KR Brownstein},
  year = {1993},
  doi = {10.1103/physrevlett.71.1427},
  url = {https://pubmed.ncbi.nlm.nih.gov/10055537/},
  note = {Source identifier: 10055537}
}