1. Mediation by 5-hydroxytryptamine of morphine stimulant actions in dog intestine;Burks;J. Pharmacol. Exptl. Therap.,1973
2. 5-Hydroxytryptamine release into dog intestinal vasculature;Burks;Amer. J. Physiol.,1966
3. Release of intestinal 5-hydroxytryptamine by morphine and related agents;Burks;J. Pharmacol. Exptl. Therap.,1967
4. Plasma levels, urinary and fecal excretion of morphine in non-tolerant and tolerant dogs;Cochin;J. Pharmacol. Exptl. Therap.,1954
5. Tolerance, physical dependence and receptors. A theory of the genesis of tolerance and physical dependence through drug-induced changes in the number of receptors;Collier,1966