V. HAVANOOR, VIJAYANAND, N.N. MALLIKARJUNA, ARUN KUMAR LAGASHETTY, and A. VENKATARAMAN. 2010. “Adsorption Studies of Ca2+ Ions on Α-Fe2O3 Dispersed Natural Rubber Composite: Structure, Morphology and Thermal Studies”. Asian Journal of Chemistry 15 (1):79-83. https://asianpubs.org/index.php/ajchem/article/view/21508.