Ashour, Safwan. “A Novel Sensitive Colorimetric Determination of Catecholamine Drug in Dosage Form via Oxidative Coupling Reaction With MBTH and Potassium Ferricyanide”. Drug Analytical Research 5, no. 1 (March 19, 2026): 51–58. Accessed August 3, 2026. https://seer.ufrgs.br/index.php/dar/article/view/113058.