Abidin, A. Z., T. Puspasari, and H. P. R. Graha. “Utilization of Cassava Starch in Copolymerisation of Superabsorbent Polymer Composite (SAPC)”. Journal of Engineering and Technological Sciences, vol. 46, no. 3, Sept. 2014, pp. 286-98, doi:10.5614/j.eng.technol.sci.2014.46.3.4.