A. Al-Mezori, H., and A. M.Ali. “Allelopathic Potential of Some Crops and Vegetables Root Exudates on Mixed Farming in Dohuk Governorate/ Iraq”. Rafidain Journal of Science, vol. 17, no. 5, Apr. 2006, pp. 39-52, doi:10.33899/rjs.2006.42811.