Equihua-Guillén, F.; Servín, R.; Muzquiz-Riojas, J. R.; Camporedondo-Saucedo, J. E.; Aguilar-González, M. Implications of Total Content of Silicon, Aluminium, Chromium and Formation of Thin Ferrite Films on Low Ductility at High Temperature in Non Oriented Electrical Steels. Rev. metal. 2011, 47, 381-389.