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Walker, Ellen A; Young, Alice M (2002) Clocinnamox distinguishes opioid agonists according to relative efficacy in normal and morphine-treated rats trained to discriminate morphine. J Pharmacol Exp Ther 302:101-10
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Walker, E A; Picker, M J; Dykstra, L A (2001) Three-choice discrimination in pigeons is based on relative efficacy differences among opioids. Psychopharmacology (Berl) 155:389-96
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Walker, E A; Young, A M (2001) Differential tolerance to antinociceptive effects of mu opioids during repeated treatment with etonitazene, morphine, or buprenorphine in rats. Psychopharmacology (Berl) 154:131-42
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Walker, E A; Tiano, M J; Benyas, S I et al. (1999) Naltrexone and beta-funaltrexamine antagonism of the antinociceptive and response rate-decreasing effects of morphine, dezocine, and d-propoxyphene. Psychopharmacology (Berl) 144:45-53
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Walker, E A; Zernig, G; Young, A M (1998) In vivo apparent affinity and efficacy estimates for mu opiates in a rat tail-withdrawal assay. Psychopharmacology (Berl) 136:15-23
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