Shatat, R.S. and Niazi, S.K. 2018. Using free radical polymerization and Mannich reaction, synthesis and characterization of cationic polyacrylamides having similar molecular weight but different charge densities. European Journal of Chemistry. 9, 2 (Jun. 2018), 79–83. DOI:https://doi.org/10.5155/eurjchem.9.2.79-83.1684.