@article{89251,
  author = {Dianne O'Leary and Michael O'Hara},
  title = {Quadratic Fermionic Interactions Yield Hamiltonians with Large Ground-state Energy Gaps},
  year = {2009},
  number = {79},
  month = {2009-03-24},
  publisher = {Physical Review A (Atomic, Molecular and Optical Physics)},
  url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=890014},
  language = {en},
}