@misc{indiciaeece63e6837f7,
  title = {Hubbard U=},
  author = {D Schmeltzer},
  year = {1990},
  doi = {10.1103/physrevb.42.1074},
  url = {https://pubmed.ncbi.nlm.nih.gov/9994661/},
  note = {Source identifier: 9994661}
}