“Effect of Pre-Harvest Treatments by Foliar Spraying with Yeast Extract and Ascorbic Acid and their Interactions on Production and Quality characteristics of pear trees var. (Coscia) M. ” (2022) Journal of Hama University, 4(14). Available at: https://journal.hama-univ.edu.sy/huj/article/view/749 (Accessed: 6 June 2026).