P, S. P., T. Gomathi, and S. P.N. “Synthesis and Characterization Chitosan Schiff Base (CSB) and Its Polyethylene Glycol (PEG) Blend ”. International Journal of Novel Trends in Pharmaceutical Sciences, Vol. 7, no. 2, Apr. 2017, pp. 57-63, https://scienztech.org/index.php/ijntps/article/view/215.