V. V. HAVANOOR, N. MALLIKARJUNA, A. KUMAR LAGASHETTY, and A. VENKATARAMAN, “Adsorption Studies of Ca2+ Ions on α-Fe2O3 Dispersed Natural Rubber Composite: Structure, Morphology and Thermal Studies”, ajc, vol. 15, no. 1, pp. 79–83, Mar. 2010.