1. Pharmacologic studies on analgesics. VII Significance of the calcium ion in morphine analgesia;Kakunaga;J. Pharmacol. Exp. Ther.,1966
2. Effects of divalent cations, cation chelators and an ionophore on morphine analgesia and tolerance;Harris;J. Pharmacol. Exp. Ther.,1975
3. Selective control of calcium levels by naloxone;Ross;Life Sci.,1976
4. Effect of a calcium chelator on morphine tolerance development;Schmidt;Eur. J. Pharmacol.,1980
5. Effects of opiate drugs on the metabolism of calcium in synaptic tissue;Ross,1978