“ Synthesis and Biological Studies of 4‐Methyl-7‐Ethylcoumarin Derivatives Containing Azo Group”. Baghdad Science Journal 21, no. 7 (July 1, 2024): 2343. Accessed September 21, 2024. https://www.bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/9143.