Harishkumar, HN, KM Mahadevan, and JN Masagalli. “Facile Synthesis of 2-(1,3-Benzoxazol/benzothiazol-2-Yl)- 3<i>H</i>-benzo[<i>f</I>]chromen-3-One As Blue Fluorescent Brighteners”. South African Journal of Chemistry 65, no. 1 (October 13, 2015): 5–9. Accessed November 10, 2026. https://www.ajol.info/index.php/sajc/article/view/123753.