@misc{indiciae9e484068e9d3,
  title = {Operations and definitions: a brief analysis.},
  author = {A Zucker},
  year = {1977},
  doi = {10.1192/bjp.131.1.111},
  url = {https://pubmed.ncbi.nlm.nih.gov/884409/},
  note = {Source identifier: 884409}
}