1. Yamamura HI, Enna SJ, Kuhar MJ (eds) (1985) Neurotransmitter receptor binding, 2nd edn. Raven Press, New York
2. Bylund DB, Deupree JD, Toews ML (2004) Radioligand-binding methods for membrane preparations and intact cells. Methods Mol Biol 259:1–28
3. Paton WDM, Rang HP (1965) The uptake of atropine and related drugs by intestinal smooth muscle of the guinea-pig in relation to acetylcholine receptors. Proc Roy Soc B. 163:1–44
4. Alexander SPH, Mathie A, Peters JA (2009) Guide to receptors and channels (GRAC) 4th edition. Br J pharmacol 158(suppl):S1–S254
5. Kenakin T (1995) On the importance of the ‘antagonist assumption’ to how receptors express themselves. Biochem Pharmacol 55:17–26