1. Ahlquist RP (1948) A study of the adrenotropic receptors. Am J Physiol 153:586–600
2. Berthelsen S, Pettinger WA (1977) A functional basis for classification of alpha-adrenergic receptors. Life Sci 21:595–606
3. Bliss CE (1967) Statistics in biology, vol 1. MacGraw-Hill, New York, pp 420–424
4. Cajal SRY (1911) Histologie du systeme nerveux de l’homme et des vertebres. Paris, A. Maloine 2:931–937
5. Chang EB, Field M, Miller RJ (1983) Enterocyte alpha2-adrenergic receptors: yohimbine and p-aminoclonidine binding relative to ion transport. Am J Physiol 244:G76-G82