Fatahi, Saeid, Alireza Khodabakhshzadeh, and Ghader Rostami Tobnag. 2020. “Effects of Putrescine Application in Culture Medium in Improving Chamomile (Chamomilla Recutita (L.) Rauschert.) Tolerance to Osmotic Stress under in Vitro Conditions: Putrescine Improves Tolerance to Osmotic Stress”. Advances in Horticultural Science 34 (2):167-74. https://doi.org/10.13128/ahsc-7820.