Akiyama, K. , Kaneko, S. , Ozawa, T. , Yokomizo, K. , Itakura, M.. "Photoluminescence Properties of β-FeSi2 on Cu- or Au-coated Si". World Academy of Science, Engineering and Technology, Open Science Index 50, International Journal of Materials and Metallurgical Engineering (2011), 5(2), 133 - 135.