@misc{indiciae7a63123bc33e,
  title = {"Negative symptoms": conceptual and methodological problems.},
  author = {A A Sommers},
  year = {1985},
  doi = {10.1093/schbul/11.3.364},
  url = {https://pubmed.ncbi.nlm.nih.gov/4035301/},
  note = {Source identifier: 4035301}
}