“A Study of Acute Toxicity to Pyrethroid Insecticide ‘KARATE’ on Fresh Water Alga Scenedesmus Quadricauda (Turb.) Bereb”. University of Thi-Qar Journal of Science, vol. 2, no. 2, Apr. 2010, pp. 3-10, http://mail.jsci.utq.edu.iq/index.php/main/article/view/330.