Subashini, R., et al. “Synthesis and Evaluation of Antimicrobial Activity of 1-Phenylpyrazolo[4,5-c]quinolin-4-One”. Asian Journal of Chemistry, vol. 21, no. 1, Mar. 2010, pp. 275-8, https://asianpubs.org/index.php/ajchem/article/view/18922.