Abstract
Whole body and brain distribution of [3H]cyclic [D-Pen2,D-Pen5] enkephalin after intraperitoneal, intravenous, oral and subcutaneous administration.
S J Weber, D L Greene, V J Hruby, H I Yamamura, F Porreca and T P Davis
Journal of Pharmacology and Experimental Therapeutics December 1992, 263 (3) 1308-1316;