Machado, R., 		Rother, A., 		Comparin, D., 		Pawar, A., 		Matos, F., 		Cunha, T., 		Alberton, L., & 		Paranhos, L.
2021 Dec 21.  Removal of the smear layer by passive and continuous ultrasonic irrigation:  a scanning electron microscopy study.. Journal of Oral Research. [Online] 10:6