Asma'a H. Shakir. “Spectrophotometric Determination of Para Aminosalicylic Acid in Serum Blood and Urin By Oxidative Coupling With 4-Amino Antipyrine and Study The Inhibition of Aldose Reductase Enzyme”. Tikrit Journal of Pure Science 21, no. 4 (February 7, 2023): 67–72. Accessed May 13, 2024. https://tjps.tu.edu.iq/index.php/tjps/article/view/1054.