1. (1) M. Takei, A. Odaka, and H. Fujimoto: “Application technique of Reverse blocking IGBT”, Fuji review,Vol. 75, No. 8, 445-448 (2002) (in Japanese)
2. (2) J. Oyama, T. Higuchi, E. Yamada, T. Koga, and T. Lipo: “New Control Strategy for matrix converter”, Proceedings of Power Electronics Society conference, pp. 360-367 (1989)