“Effect of Ethephon, Boron and Zinc Spray on Anatomical Characters of Sunflower Crop (Helianthus Annuus L.)”. Iraqi Journal of Science, vol. 54, no. 4Appendix, Jan. 2024, pp. 1078-83, https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/12425.