J. Azeez, Yousif, and Rebwar O. Hassan. “Spectrophotometric Determination of Vitamin B1 (Thia Min Hydrochloride)In Pharmaceutical Preparation by Coupling Reaction With Diazotized Sulfanilic Acid”. Tikrit Journal of Pharmaceutical Sciences, vol. 1, no. 2, Mar. 2023, pp. 1-8, doi:10.25130/tjphs.2005.2.1.1.8.