@misc{indiciae7d5550cae309,
  title = {The enkephalins and opiates: structure-activity relations.},
  author = {A S Horn and J R Rodgers},
  year = {1977},
  doi = {10.1111/j.2042-7158.1977.tb11308.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/17687/},
  note = {Source identifier: 17687}
}