Mahdi, Muna Iskandar, and Kassim Hassan Kadim. “Spectrophotometric Determination for Benzodiazepine Drugs (Clonazepam and Nitrazepam) in Pure and Pharmaceuticals Preparation”. Asian Journal of Chemistry, vol. 30, no. 12, Oct. 2018, pp. 2686-92, doi:10.14233/ajchem.2018.21549.