A. A., Y., and J. D. A. K. “Effect of Gibberellin, Foliartal Foliar Fertilizer and Growing Medium in Leaves Content of Active Substance of Oleander Plant (Nerium Oleander L.)”. Al-Qadisiyah Journal of Pure Science, Vol. 22, no. 3, Mar. 2018, pp. 415 -30, https://journalsc.qu.edu.iq/index.php/JOPS/article/view/680.