1. The status of standardized endodontic instruments;Harty;J Br Endod Soc,1972
2. Evaluation of standardized root canal instruments and obturating points;Kerekes;J Endod,1979
3. Variaciones fisicas, diametro y grado de conicidad en conos de gutapercha y limas tipo K;Echevarria;Rev Esp Endodoncia,1983
4. A comparison of endodontic file quality and file dimensions;Cormier;J Endod,1988