Gastrointestinal hormones.

@article{Barrington1976GastrointestinalH,
  title={Gastrointestinal hormones.},
  author={E. J. W. Barrington and Graham J. Dockray},
  journal={The Journal of endocrinology},
  year={1976},
  volume={69 2},
  pages={299-325}
}