Kassem, N., A. Negm, N. Shukry, and S. . El-Kalyouby. “Synthesis of PH-Sensitive CMC /Chitosan Hydrogels by Gamma Irradiation ”. Journal of Composites and Biodegradable Polymers, vol. 2, no. 1, Feb. 2014, pp. 22-30, doi:10.12974/2311-8717.2014.02.01.3.