Analgesic Action and Brain and Plasma Levels of Morphine and Codeine in Morphine Tolerant, Codeine Tolerant and Non-tolerant Rats.

@article{Jhannesson1964AnalgesicAA,
  title={Analgesic Action and Brain and Plasma Levels of Morphine and Codeine in Morphine Tolerant, Codeine Tolerant and Non-tolerant Rats.},
  author={Torkell J{\'o}hannesson and Louis A. Woods},
  journal={Acta pharmacologica et toxicologica},
  year={1964},
  volume={21},
  pages={381-96}
}