A. Ramadan, N., S. R. Abd-Alela, and N. N. Saaed. “Salicylic Acid and Acetylsalicylic Induced Resistance to Powdery Mildew Disease of Milk Thistle (Syllibium Marianum)”. Rafidain Journal of Science, vol. 27, no. 1, Mar. 2018, pp. 214-21, doi:10.33899/rjs.2018.143930.