1. Adler, M. W., and Geller, E. B. (1993). Physiological functions of opioids: Temperature regulation. In Herz, A. (ed.)Handbook of Experimental Pharmacology, Opioids II, (Vol. 104/II). Springer-Verlag, Berlin, pp. 205–229.
2. Akil, H., Watson, S. J., Young, E., Lewis, M. E., Khachaturian, H., and Walker, J. J. (1984). Endogenous opioids: Biology and function.Annu. Rev. Neurosci. 7223–255.
3. Archer, S. (1993). Chemistry of non-peptide opioids. In Herz, A. (ed.)Handbook of Experimental Pharmacology, Opioids I, (Vol. 104/I). Springer-Verlag, Berlin, pp. 241–271.
4. Aruffo, A., and Seed, B. (1987). Molecular cloning of a CD28 cDNA by a high-efficiency COS cells expression system.Proc. Natl. Acad. Sci. USA 848573–8577.
5. Augustin, L. B., Flesheim, R. F., Min, B. H., Fuchs, S. M., Fuchs, J. A., and Loh, H. H. (1995). Genomic structure of the mouse delta opioid receptor gene.Biochem. Biophys. Res. Commun. 207111–119.