[Morphine-like peptides and the digestive tract].

@article{Walus1981MorphinelikePA,
  title={[Morphine-like peptides and the digestive tract].},
  author={Kazimierz M. Walus and Wieslaw W. Pawlik},
  journal={Postepy higieny i medycyny doswiadczalnej},
  year={1981},
  volume={35 6},
  pages={611-24}
}