Srinivasa Rao, N., et al. “Synthesis and Antimicrobial Activity of 2,3-(Substituted Phenyl) Pyrazine Dicarboxamide”.
Asian Journal of Chemistry
, vol. 19, no. 1, Mar. 2010, pp. 821-2, https://asianpubs.org/index.php/ajchem/article/view/20561.