1. Hilton, Ordway, Scientific Examination of Questioned Documents. Revised Ed. (New York: Elsevier/North-Holland Inc.1982). p161.
2. Huber, Roy A. and Headrick, A.M. The Identification Process. Presented at the11th meeting of the International Association of Forensic Sciences (Vancouver, 1987).
3. Found, Bryan and Rogers, Doug, Contemporary Issues in Forensic Handwriting Examination. A Discussion of Key Issues in the Wake of the Starzecpyzel Decision. Journal of Forensic Document Examination, 1995fall; 8: pp1-31.