1. Erased identification marks;Nickolls,1956
2. Metallurgical aspects of serial number recovery;Polk;AFTE J.,1989
3. Restoration of vehicle identification numbers;Kuppuswamy;J. Forensic Ident.,2004
4. Restoration of serial numbers;Katterwe,2006
5. The Principles of Metallographic Laboratory Practice;Kehl,1949