1. Hanington, E., Brit. Med. J., 2, 550 (1967).
2. Sandler, M., Youdim, M. B. H., Southgate, J., and Hanington, E., in Background to Migraine, Third Migraine Symp. (edit. by Cochrane, A. L.), 104 (Heinemann, London, 1970).
3. Lemberger, L., Klutch, A., and Kuntzman, R., J. Pharmacol. Exp. Ther., 153, 183 (1966).
4. Asatoor, A. M., Levi, A. J., and Milne, M. D., Lancet, ii, 733 (1963).
5. Blackwell, B., and Marley, E., Bibl. Nutrit. Dieta, No. 11, 96 (1969).