1. Allen, Alfred H. Commercial organic analysis, pp. 250, 254. 1905.
2. Allport, N. L. and Wilson, E. S. Rapid colorimetric assay of belladonna and stramonium. Quart. Jour. Pharm. & Pharmacol.12: 399–408. 1939.
3. Andrews, A. E. The active constituents of the Indian solanaceous plants,Datura Stramonium, D. fastuosa, andDatura Metel. Jour. Chem. Soc. (London) 1871-1877. 1911.
4. Arny, H. V. and Fischelis, R. P. Principles of pharmacy. 1937.
5. Autenrieth, W. and Warren, W. H. Laboratory manual for the detection of poisons and powerful drugs. pp. 182, 184. 1928.