1. Full production laser processing of electrical steel;Neiheisel;SPIE Laser Process.: Fund. Appl. Syst. Eng.,1986
2. Electrical steels past, present and future developments;Moses;IEE Proc., Part A,1990
3. Armco Corporation, Home Page, http://www.armco.com/brochure/product/Electric/Electric.html.
4. G. Ravisankar, Laser processing for enhancement of energy efficiency in transformers, M.S. Thesis, Iowa State University, Ames, IA, 1997.
5. D.M. Haynes, D.S. Wolford, US Patent No. 2,234,968 (1924).