Ayash, Abdulkarim, Issam Mohammad, and Rana Nassour. “The Effect of Ultraviolet Radiation on Photosynthetic Pigments in Euglena Gracilis”. Tishreen University Journal -Basic Sciences Series 40, no. 2 (October 28, 2018). Accessed May 8, 2024. https://journal.tishreen.edu.sy/index.php/bassnc/article/view/4351.