Suaad H. Ali Al - Badri and Abdul –Wahab Resan AL - Ebady, “Effect Of Selenium on Antioxidant Enzymes and Content of Photosynthetic Pigments in algae Chlorococcum littorale Chihara,Nakayama &Inouye”, UTJ, vol. 13, no. 3, pp. 42–56, Apr. 2019.