„Atropine content of plants”. USDA, ARS, National Genetic Resources Program. Phytochemical and Ethnobotanical Databases. [Online Database] National Germplasm Resources Laboratory, Beltsville, Maryland. Arhivat din original la . Accesat în .
„Cocaine content of plants”. USDA, ARS, National Genetic Resources Program. Phytochemical and Ethnobotanical Databases. [Online Database] National Germplasm Resources Laboratory, Beltsville, Maryland. Arhivat din original la . Accesat în .
„Atropine content of plants”. USDA, ARS, National Genetic Resources Program. Phytochemical and Ethnobotanical Databases. [Online Database] National Germplasm Resources Laboratory, Beltsville, Maryland. Arhivat din original la . Accesat în .
„Cocaine content of plants”. USDA, ARS, National Genetic Resources Program. Phytochemical and Ethnobotanical Databases. [Online Database] National Germplasm Resources Laboratory, Beltsville, Maryland. Arhivat din original la . Accesat în .