@misc{indiciae2e8e4e3f0f96,
  title = {Drug self-administration methods in abuse liability evaluation.},
  author = {J E Henningfield and C Cohen and S J Heishman},
  year = {1991},
  doi = {10.1111/j.1360-0443.1991.tb01750.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/1786489/},
  note = {Source identifier: 1786489}
}