Bashi, Z., زهراء, Jankeer, M. and منى (2008) “Effectiveness of the enzyme cytosine deaminase in the free living ciliary organism Tetrahymena pyriformis (Ehrenberg, 1830)”, Journal of Education and Science (JES), 21(3), pp. 15–27. doi: 10.33899/edusj.2008.56042.