Prasad, N., A. Sahay, and N. P. Singh. “ELECTRON IMPACT STUDIES ON SOME ETHYL 2,3-DIOXOBUTYRATE-2-PHENYLHYDRAZONES: Short Communication”. Biological Sciences - PJSIR, vol. 44, no. 4, Aug. 2001, pp. 215-7, https://v2.pjsir.org/index.php/biological-sciences/article/view/1927.