1. Ambache, N., Killick, S. W., Aboo Zar, M.: Antagonism by burimamide of inhibitions induced by histamine in plexuscontaining longitudinal muscle preparations from guinea-pig ileum. Br. J. Pharmacol. 48, 362?363P (1973)
2. Ash, A. S. F., Schild, H. O.: Receptors mediating some actions of histamine. Br. J. Pharmacol. 27, 427?439 (1966)
3. Bareicha, I., Rocha e Silva, M.: Occurrence of H2-receptors for histamine in the guinea-pig intestine. Biochem. Pharmacol. 24, 1215?1219 (1975)
4. Bareicha, I., Rocha e Silva, M.: H1-and H2-receptors for histamine in the ileum of the guinea pig. Gen. Pharmacol. 7, 103?106 (1976)
5. Bertaccini, G., Impicciatore, M., Vitali, T.: Biological activities of a new specific stimulant of histamine H2 receptors. Il Farmaco Ed. Sci. 31, 935?938 (1976)