El-Shaaer, Hafez Mohamed. “Cyclocondensation, Antimicrobial Activity and Semi-Empirical AM1-MO Calculations of Benzopyrone Derivatives”. European Journal of Chemistry 3, no. 1 (March 31, 2012): 51–56. Accessed January 31, 2025. https://mail.eurjchem.com/index.php/eurjchem/article/view/500.