P. K. Dwivedi, A. Pathak, P. Malairajan, and D. Chaturvedi, “Design, Synthesis and Antimicrobial Evaluations of Novel 3,7-Disubstituted 2H-1-Benzopyran-2-ones”, ajc, vol. 32, no. 9, pp. 2397–2402, Aug. 2020.