G. Bhovi, Manjunath, and Guru S. Gadaginamath. “Synthesis and Antimicrobial Activity of Some 1,5-Dioxadiazolyl Ditriazolyl and Dipyrrolylindole Derivatives”. Asian Journal of Chemistry, vol. 17, no. 1, Mar. 2016, pp. 518-24, https://asianpubs.org/index.php/ajchem/article/view/19809.