“Mass Fragmentation Pattern of Some Mono- and Di-Substituted Formamidines. Part-1. Mass Pattern of 1-Arylformamidines”. Biological Sciences - PJSIR, vol. 48, no. 6, Dec. 2005, pp. 386-8, https://www.v2.pjsir.org/index.php/biological-sciences/article/view/1429.