[1] JANET M. SHARP Pauline M D. Characteristics of growth and tropane alkaloid synthesis in Atropa belladonna roots transformed by Agrobacterium rhizogenes[J]. Journal of biotechnology, 1990, 16 3: Pages 171-185. DOI:
10.1016/0168-1656(90)90034-9[2] M P CAULFIELD N J B. International Union of Pharmacology. XVII. Classification of muscarinic acetylcholine receptors.[J]. Pharmacological Reviews, 1998, 50 2: 279-290.
[3] D. ZLOTOS U H W Bender. Muscarinic receptor agonists and antagonists[J]. Expert Opinion on Therapeutic Patents, 1999, 9 1: 1029-1053. DOI:
10.1517/13543776.9.8.1029 
