1. ISO 3630-1, Dental root canal instruments—part 1;International Standards Organisation,1992
2. Physical properties of stainless steel endodontic files and reamers;Craig;Oral Surg Oral Med Oral Pathol,1963
3. AS 1411 dental stainless steel root canal files and reamers;Standards Australia,1976
4. Mechanical metallurgy;Dieter,1961
5. A guide for working the Miniload hardness tester;Leitz,1972