1. Beuthin, F. C., Miya, T. S., Blake, D. E., Bousquet, W. F.: Enhanced sensitivity to noradrenergic agonists and tolerance development to alpha-methyl-tyrosine in the rat. J. Pharmacol. exp. Ther. 181, 446?456 (1973)
2. Bhargava, H. N., Afifi, A., Way, E. L.: Effect of chemical sympathectomy on morphine antinociception and tolerance development. Biochem. Pharmacol. 22, 2769?2772 (1973)
3. Bläsig, J., Herz, A., Reinhold, K., Zieglänsberger, S.: Development of physical dependence on morphine in respect to time and dosage and quantification of the precipitated withdrawal syndrome in rats. Psychopharmacologia (Berl.) 33, 19?38 (1973a)
4. Bläsig, J., Reinhold, K., Herz, A.: Effect of 6-hydroxydopamine, 5,6-dihydroxytryptamine and raphe lesions on the antinociceptive actions of morphine in rats. Psychopharmacologia (Berl.) 31, 111?119 (1973b)
5. Bloom, F. E.: Fine structural changes in rat brain after intracisternal injection of 6-hydroxydopamine. In: 6-Hydroxydopamine and catecholamine neurones. T. Malmfors and H. Thoenen (eds.), pp. 171?186. Amsterdam-London: North Holland Publ. Comp. 1971