M. Yusoff, S. F. (2013) “Protonated 14-membered 5,5,7,12,12,14-hexamethyl-1,4,8,11-tetrazacyclotetradeca-7,14-diene Salts and Their Biological Activity”, International Journal on Advanced Science, Engineering and Information Technology, 3(2), pp. 142–144. doi: 10.18517/ijaseit.3.2.317.