@misc{indiciae7483f35bd3b7,
  title = {Calcium channel antagonists and adenosine analogues decrease tolerance to opiate pentazocine and U 50488H.},
  author = {E Contreras and L Quijada and A Germany and R Fleckenstein and A Hernández},
  year = {1993},
  doi = {10.1016/0306-3623(93)90369-9},
  url = {https://pubmed.ncbi.nlm.nih.gov/8270180/},
  note = {Source identifier: 8270180}
}