@misc{indiciae923fea969bd3,
  title = {Exercise. 2.},
  author = {M E Knapp},
  year = {1969},
  doi = {10.1080/00325481.1969.11697109},
  url = {https://pubmed.ncbi.nlm.nih.gov/5794329/},
  note = {Source identifier: 5794329}
}