@misc{indiciae25cc1e005ce2,
  title = {Subordinate quadratic forms and their complementary forms.},
  author = {M Morse},
  year = {1971},
  doi = {10.1073/pnas.68.3.579},
  url = {https://pubmed.ncbi.nlm.nih.gov/16591912/},
  note = {Source identifier: 16591912}
}