Y. RAJENDRA PRASAD, P. RAVI KUMAR, C. ASHA DEEPTI, and M. RAMANA, “Synthesis and Antimicrobial Activity of Some Chalcones of 3-Acetyl Coumarin and 2-Hydroxy-1-acetonapthone”, ajc, vol. 19, no. 6, pp. 4799–4804, Mar. 2010.