S. R. GHANTI, et al. “SYNTHESIS OF 14-MEMBERED TETRAAZAMACROCYCLIC COMPLEXES AND THEIR PHYSICO-CHEMICAL CHARACTERIZATIONS AND BIOLOGICAL SCREENING”. International Journal of Pharma and Bio Sciences, vol. 4, no. 3, Sept. 2013, pp. 1002-11, https://ijpbs.net/index.php/journal/article/view/2534.