TY  - RPRT
TI  - Opioid peptides and opiates differ in receptor selectivity.
AU  - L Terenius
PY  - 1977
DO  - 10.1016/0306-4530(77)90031-2
UR  - https://pubmed.ncbi.nlm.nih.gov/198833/
ID  - 198833
ER  -