6Vencislav Valcheva, Alex Van den Bosscheb. Core Losses in Nanocrystalline Soft Magnetic Materials under Square Voltage Waveforms[ J]. Journal of Magnetism and Magnetic Materials,2008,1 : 1320-1324.
7Georgi T Nikolova, Vencislav C Valchev. Nanoerystalline Magnetic Materials Versus Ferrites in Power Electronics [ J ]. Proeeduee Earth and Planetary Science ,2009,1 : 1357-1361.
