1. Ramesh, S. et al. (2020). Effect of calcium carbonate on mechanical and morphological properties of natural rubber composites, Journal of Elastomers & Plastics, 52(4), 312--326.
2. Shimi Madani Hamedan Co. -- Technical Data Sheets, http://www.cmhco.ir/
3. JJHR Group. (2023). Application of Calcium Carbonate in Rubber Products, www.jjhrgroup.com
4. ACCM Egypt. (2022). Role of Calcium Carbonate in Enhancing Rubber Industry, www.accm.com.eg
5. Ismail, H. et al. (2019). Calcium carbonate as functional filler in rubber matrix composites: A review, Polymer Testing, 78, 105994.