1. Friedman S. Treatment outcome and prognosis of endodontic therapy. In Ørstavik D, Pitt Ford T R (eds) Essential Endodontology. 2nd ed. pp. 441-447. Oxford: Blackwell Science, 2008.
2. Qualtrough A, Alani A, Bandheri S, Mehta D, Ng Y, Saksena A, Tomson P, created in colloboration with the British Endodontic Society. Royal College of Surgeons: Guidelines for Periradicular Surgery. 2020. Available at https://www.rcseng.ac.uk/dental-faculties/fds/publications-guidelines/clinical-guidelines/ (accessed February 2020).
3. Evans G, Bishop K, Renton T. Royal College of Surgeons: Guidelines for Surgical Endodontics. 2012. Available at https://www.rcseng.ac.uk/dental-faculties/fds/publications-guidelines/clinical-guidelines/ (accessed January 2020).
4. Khan A, Aziz H, Zaman H. Indication for Surgical Endodontics in accordance with NICE guidelines. Int Dent J Stud Res 2016; 4: 45-48.
5. Fahey T, O'Connor N, Walker T, Chin-Shong D. Surgical endodontics: a review of current best practice. Oral Surgery 2011; 4: 97-104.