1. Axelrod, J. Clin. Sci. Mol. Med. 51, 415–421 (1976).
2. Bolme, P., K. Fuxe, and P. Lidbrink, Res. Comm. Chem. Path. Pharmacol. 4, 657–697 (1972).
3. Boura, A. L. A., and. A. F. Green, A. Rev. Pharmac. 5, 183–212 (1965).
4. Chalmers, J. P., Circulât. Res. 36, 469–480 (1975).
5. Dahlström, A., and K. Fuxe, Acta Physiol. Scand. 62, Suppl. 232, 1–55 (1964).