Elliott J (1997). „Alpha-adrenoceptors in equine digital veins: evidence for the presence of both α1 and α2-receptors mediating vasoconstriction”. J. Vet. Pharmacol. Ther.20 (4): 308–17. DOI:10.1046/j.1365-2885.1997.00078.x. PMID9280371.
Elliott J (1997). „Alpha-adrenoceptors in equine digital veins: evidence for the presence of both α1 and α2-receptors mediating vasoconstriction”. J. Vet. Pharmacol. Ther.20 (4): 308–17. DOI:10.1046/j.1365-2885.1997.00078.x. PMID9280371.