Ramakrishna, G., B. Ramakrishna, S. S. reddy, and V. L. Narasimha. “Effect of Type of Aggregate on Ultrasonic Pulse Velocity of Concrete”. Journal of Structural Engineering, vol. 36, no. 1, Mar. 2025, pp. 44-48, http://jose.serc.res.in/index.php/JOSE/article/view/1269.