1. H. Dale andP.P. Laidlaw,The physiological action of β-imidazolylethylamine, J. Physiol., Lond.41, 318 (1910).
2. N. Chand andP. Eyre,Histamine receptors of airway smooth muscle of ferret and rat, Res. Commun. Chem. Pathol. & Pharmacol.21, 55 (1978).
3. N. Chand, P. Eyre andL. DeRoth,Relaxant action of histamine on rabbit trachea: possible existence of third histamine receptor subtype, Res. Commun. Chem. Pathol. & Pharmacol.23, 211 (1979).
4. P. Eyre andR.N. Besner,Cimetidine fails to block functional antagonism of carbachol by histamine in rat trachea, Res. Commun. Chem. Pathol. & Pharmacol.24, 457 (1979).
5. J.H. Drazen, M.W. Schneider andC.S. Venugopalan,Bronchodilator activity of dimaprit in the guinea-pig in vivo and in vitro, Eur. J. Pharmac.55, 233 (1978).