1. New method for measuring the length of the root canal;Sunada;J Dent Res,1962
2. Basic studies on electronic method for measuring the root canal length;Takei;J Dent Res,1983
3. Clinical application of endotape (I);Hasegawa;J Dent Res,1984
4. A new method and apparatus for measuring the root canal length;Hasegawa;J Dent Res,1985
5. Basic studies on electronic method for measuring root canal length;Kato;J Dent Res,1986