@misc{indiciae6951bec15f40,
  title = {Second class distinction.},
  author = {J M Baisch and J D Capra},
  year = {1991},
  doi = {10.1016/0960-9822(91)90201-7},
  url = {https://pubmed.ncbi.nlm.nih.gov/15336087/},
  note = {Source identifier: 15336087}
}