@article{marin1990-2403472,
  author  = {Marin, R. S.},
  title   = {{Differential diagnosis and classification of apathy}},
  journal = {The American journal of psychiatry},
  year    = {1990},
  doi     = {10.1176/ajp.147.1.22},
  pmid    = {2403472},
  url     = {https://doi.org/10.1176/ajp.147.1.22}
}