Makhoul, Georges Makhoul, Mouhammad Naddaf, Ali Zidan, and Ruba Abu Alshamlat. 2020. “Influence of Foliar Application of Boron , Zinc and Humic Acid on Production of Olive Fruit (khodeiry variety), Quality of Fruit and Content of Oil”. Tishreen University Journal -Biological Sciences Series 42 (1). https://journal.tishreen.edu.sy/index.php/bioscnc/article/view/9491.