Self-administration of acetylsalicylic acid and combinations with codeine and caffeine in rhesus monkeys.

@article{Hoffmeister1973SelfadministrationOA,
  title={Self-administration of acetylsalicylic acid and combinations with codeine and caffeine in rhesus monkeys.},
  author={Friedrich Hoffmeister and Wolfgang Prof. Dr. Wuttke},
  journal={The Journal of pharmacology and experimental therapeutics},
  year={1973},
  volume={186 2},
  pages={
          266-75
        }
}