@misc{indiciae72be270b3194,
  title = {RIGIDITY AND THE SORT.},
  author = {P LANGER and C W MCKAIN},
  year = {1964},
  doi = {10.1002/1097-4679(196410)20:4<489::aid-jclp2270200423>3.0.co;2-d},
  url = {https://pubmed.ncbi.nlm.nih.gov/14228561/},
  note = {Source identifier: 14228561}
}