1. Tsai, S.-H., Tew, J. M., and Shipley, M. T. (1989) J. Comp. Neurol. 279, 1–12.
2. Van Riper, D. A. and Bevan, J. A. (1991) J. Pharmacol. Exp. Ther. 257, 879–886.
3. Duverger, D., Edvinsson, L., McKenzie, E. T., Oblin, A., Rouquier, L., Scatton, B., and Zivkovic, B. (1987) J. Cereb. Blood Flow Metab. 7, 497–501.
4. Amsterdam/New York/Oxford;JA Bevan,1989
5. Gaw, A. J. and Wadsworth, R. M. (1989) Br. J. Phamacol. 98, 741–746.