References

1. Hawkins KN, Morelli M, Gulya K, Chang KJ, Yamamura HI. (1987) Autoradiographic localization of [3H] [MePhe3,D-Pro4]morphiceptin ([3H]PL017) to mu opioid receptors in rat brain. Eur J Pharmacol, 133 (3): 351-2. [PMID:3030778]