1. New method for measuring the length of the root canal;Sunada;J Jpn Stomatol Soc,1958
2. New method for measuring the length of the root canal;Sunada;J Dent Res,1962
3. Electronic measurement of the length of the root canal;Huang;Bull 4th Milit Med Coll,1959
4. A discussion on electronic root canal measurement;Huang;Chinese J Stomatol,1965
5. The method for measuring the length of the tooth using the A C ohmmeter;Komamura;Jpn J Conserv Dent,1965