1. Variations in the Diametric Measurements of Root Canal Files and Corresponding Sizes of Silver Root Canal Points;Wais,1954
2. Microscopic Investigation of Root Canal Diameters;Green;J. Am. Dent. A,1958
3. Microscopic Investigation of Root Canal File and Reamer Widths;Green;Oral Surg., Oral Med. & Oral Path,1957
4. A Preliminary Investigation of the Feasibility of Stainless Steel Files as Root Canal Filing Instruments and as a Root Canal Filling Material;Bucher,1958
5. A Study of the Structural, Dimensional, and Physical Characteristics of Root Canal Instruments;Heuer,1959