Obi, J. C., Ezenwa, T. E. and Vera, E. (2019) “Synthesis Characterization and Biological Activities of 4-Hydroxycoumarin Derivatives”, European Journal of Scientific Exploration, 2(1). Available at: https://syniutajournals.com/index.php/EJSE/article/view/53 (Accessed: 2May2024).