H. SAFAR MAHDI, W. I. HUSSEIN, H. M. SALIH, and S. M. A. ALI YOUSSEF, “EFFECT OF PRE-SOWING TREATMENTS ON SEED GERMINATION OF P. eurycarpa AND P. khinjuk – KURDISTAN REGION”, JDU, vol. 20, no. 1, pp. 105-113, Apr. 2018.