IBRAHIM A. MATTER, OSAMA M. DARWESH, and FAROUK K. EL-BAZ. 2016. “Using the Natural Polymer Chitosan in Harvesting Cenedesmus Species under Different Concentrations and Cultural Ph Values”. International Journal of Pharma and Bio Sciences 7 (4):254-60. https://ijpbs.net/index.php/journal/article/view/5467.