@misc{indiciae9d090de24aee,
  title = {Morphine tolerance: is there evidence for a conditioning model?},
  author = {R L Hayes and D J Mayer},
  year = {1978},
  doi = {10.1126/science.635595},
  url = {https://pubmed.ncbi.nlm.nih.gov/635595/},
  note = {Source identifier: 635595}
}