Raie, Saleem, Ahmad Ahmad, and Hassan Ahmad. 2018. “Role of Salicyic Acid in Induction Systemic Acquired Resistance in Cucurbita Pepo Plant Against Zucchini Yellow Mosaic Virus”. Tishreen University Journal -Biological Sciences Series 39 (3). https://journal.tishreen.edu.sy/index.php/bioscnc/article/view/3900.