A. Tawfiq, Arwa, and Ibrahim S. Alsaadawi. “Allelopathic Effect of Root Exudates of Two Sunflower Cultivars on Companion Weeds”. Iraqi Journal of Science 55, no. 4A (June 24, 2026): 1516–1509. Accessed July 3, 2026. https://www.ijs.uobaghdad.edu.iq/index.php/eijs/article/view/11247.