Abdulwahab, M. A., D. M. Almotairi, B. F. Aldawish, S. R. Alluqmani, A. A. Dajam, A. A. Alzahrani, M. S. Alghamdi, S. S. Almutairi, A. S. Alzarea, R. A. Azzeem, A. A. Ihsan, and T. N. Najem. “Persistence of Bacteria and Its Role in Endodontic Treatment Failure”. International Journal Of Community Medicine And Public Health, vol. 9, no. 1, Dec. 2021, pp. 432-6, doi:10.18203/2394-6040.ijcmph20214834.