@misc{indiciaeb225f4d4dc65,
  title = {Change by necessity?},
  author = {P A Ebert},
  year = {1972},
  doi = {10.1016/0002-9610(72)90341-8},
  url = {https://pubmed.ncbi.nlm.nih.gov/5032016/},
  note = {Source identifier: 5032016}
}