1. The dependence of the results of pulp therapy on certain factors. An analytic study based on radiographic and clinical follow-up examinations;Strindberg;Acta Odontol Scand,1956
2. An investigation into the factors which may influence the prognosis of root canal therapy;Nicholls,1960
3. The prognosis of pulp and root canal therapy. A clinical and radiographic follow-up examination;Grahnen;Odontol Revy,1961
4. Factors affecting successful repair after root canal therapy;Seltzer;JADA,1963
5. The correlation between positive culture and the prognosis of root canal therapy after pulpectomy;Engstrom;Odontol Revy,1965