Elsayed, E. A., and M. A. Wadaan. “The Potential of Hydrocyclone Application for Mammalian Cell Separation in Perfusion Cultivation Bioreactors”. International Journal of Biotechnology for Wellness Industries, vol. 2, no. 4, Dec. 2013, pp. 153-6, doi:10.6000/1927-3037.2013.02.04.2.