John, Stella. “Comparative Evaluation of Ultrasonic and Sonic Activation Techniques on Irrigant Penetration and Debris Removal in Complex Root Canal Systems”. Indian Journal of Pharmaceutical and Biological Research 8, no. 04 (December 31, 2020): 17-20. Accessed December 19, 2025. https://ijpbr.in/index.php/IJPBR/article/view/1109.