Muslim, T., M. T. Alam, H. A. Begum, and S. S. Alam. “Synthesis of Some Chitosan Derivatives and Their Iron (II) Adsorption Behavior- a Class of Pharmaceutically Important Biosorbents”. Bangladesh Pharmaceutical Journal, vol. 17, no. 2, Feb. 2015, pp. 193-01, doi:10.3329/bpj.v17i2.22340.