H. Harishkumar, K. Mahadevan, and J. 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”, SAJChem, vol. 65, no. 1, pp. 5–9, Oct. 2015.