Sastrodihardjo, S., and R. Wahid. “The Uptake of 32P by Brown Planthoppers (Nilaparvata Lugens Stal) Gonads”. Journal of Mathematical and Fundamental Sciences, vol. 13, no. 1/2, Jan. 2019, pp. 13-18, https://journals.itb.ac.id/index.php/jmfs/article/view/9585.