Al- Hussieny, Ahmed Aidan, et al. “Study the Mechanism of Kinetic Growth of Algae Stuck on Various Materials As Assistant Medium for Growth in Tigris River”. Journal of Biotechnology Research Center (JOBRC), vol. 7, no. 3, Dec. 2013, pp. 45-53, doi:10.24126/jobrc.2013.7.3.282.