“Estimation of the Folic Acid Using Zero Order, Area Under Curve and First Derivative Spectrophotometric Methods in Pure and Marketed Tablet Formulations”. Al-Nahrain Journal of Science 20, no. 3 (September 1, 2017): 34–41. Accessed May 3, 2024. https://anjs.edu.iq/index.php/anjs/article/view/101.