1. The dependence of the results of pulp therapy on certain factors;Strindberg;Acta Odontol Scand,1956
2. The prognosis of pulp and root canal therapy. A clinical and radiographic follow up examination;Grahnen;Odontol Revy,1961
3. Success rate in root canal therapy. A retrospective study of conventional cases;Harty;BR Dent J,1970
4. Retreatment versus further treatment;Taintor;Clin Prev Dent,1983
5. A histological and roentgenological study of a periapical region of human upper incisors;Brynolf;Odontol Revy,1967