Singh, Arjun, Sanjeevan Aggrawal, and Darshan Lal. “Effect of Formaldehyde to Phenol Ratio in Phenolic Beads on Pore Structure, Adsorption and Mechanical Properties of Activated Carbon Spheres”. Defence Science Journal 69, no. 1 (January 10, 2019): 46–52. Accessed June 17, 2025. https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/12821.