@misc{indiciae1e186798b9a5, title = {Peptides with morphine-like action in the brain.}, author = {H W Kosterlitz and J Hughes}, year = {1977}, doi = {10.1192/bjp.130.3.298}, url = {https://pubmed.ncbi.nlm.nih.gov/14762/}, note = {Source identifier: 14762} }