“Spectrophotometric Determination of Vitamin B1 (Thia min Hydrochloride)In Pharmaceutical Preparation by Coupling Reaction with Diazotized Sulfanilic acid”., Tikrit J. Pharm. Sci., vol. 1, no. 2, pp. 1–8, Mar. 2023, doi: 10.25130/tjphs.2005.2.1.1.8.