Abstract
5-hydroxytryptamine (HT)1A receptors and the tail-flick response. III. Structurally diverse 5-HT1A partial agonists attenuate mu- but not kappa-opioid antinociception in mice and rats.
M J Millan and F C Colpaert
Journal of Pharmacology and Experimental Therapeutics March 1991, 256 (3) 993-1001;