NIRDOSH PATIL, and RAMACHANDRA AKKASALI. “Non-Template Synthesis and Antimicrobial Activities of Tetraazamacrocyclic Ligands With Variable Ring Sizes”. International Journal of Pharma and Bio Sciences, vol. 1, no. 2, June 2010, pp. 1-6, https://ijpbs.net/index.php/journal/article/view/308.