@misc{indiciae2e4f252e95a3,
  title = {Pavlovian conditional stimuli cannot always be defined solely in physical terms.},
  author = {H Lachnit and W Pieper and A Hilpert and H D Kimmel},
  doi = {10.1007/bf02700427},
  url = {https://pubmed.ncbi.nlm.nih.gov/3231495/},
  note = {Source identifier: 3231495}
}