El-Shaaer, Hafez Mohamed. “An Efficient Synthesis of Some New Isolated and Fused 2-Oxo-2H-Chromene Derivatives As Antimicrobial and Antitumor Agents”. European Journal of Chemistry 4, no. 2 (June 30, 2013): 138–145. Accessed December 27, 2024. https://eurjchem.com/index.php/eurjchem/article/view/749.