@misc{indiciae40fdde207599,
  title = {A method for clustering eigenvalues.},
  author = {L Irwin},
  year = {1966},
  doi = {10.1007/bf02289452},
  url = {https://pubmed.ncbi.nlm.nih.gov/5220680/},
  note = {Source identifier: 5220680}
}