Elsharkawy, Eman. “Allelopathy Effects of Silver Nanoparticle Synthesis by Green Method from Pulicaria Undulate”. Annual Research & Review in Biology 32, no. 2 (June 28, 2019): 1-9. Accessed April 14, 2021. https://journalarrb.com/index.php/ARRB/article/view/30078.