Vaso, Kozeta, et al. “Antibacterial Activity of Compounds Synthesized From 4-Chloro-3-Nitro-2H-[1]-Benzopyran-2-One”. Asian Journal of Chemistry, vol. 22, no. 9, July 2010, pp. 7313-7, https://asianpubs.org/index.php/ajchem/article/view/11984.