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2. Periapical surgery;Hirsch;Int J Oral Surg,1979
3. Radiographic criteria for the assessment of healing after endodontic surgery;Rud;Oral Surg Oral Med Oral Pathol,1972
4. Retrograde rootfilling with Cavit: a clinical and roentgenological study;Nord;Svensk Tandlak T,1970
5. Injection obturation in surgical endodontics;Mosby;Oral Surg Oral Med Oral Pathol,1974