1. (1) J. R. Herndershot, Jr. and T. J. E. Miller: “Design of Brushless Permanent-Magnet Motors”, Magna Phisics (1994)
2. (2) A. Hoshino, S. Isobe, M. Morimoto, T. Kosaka, and N. Matsui: “A Design Procedure for the Applications-Speicific Electric Motors”, Trans. IEE of Japan, Vol. 123, No. 11, pp. 1262-1268 (2003) (in Japanese)
3. (3) S. Minnet and C. Jonsson: “Magnetic powder a breakthrough for electric motor design”, Metal powder report by hoganas AB FEB. 2003 (2003)
4. (4) Y. Enomoto, M. Ito, K. Asaka, C. Ishihara, R. Masaki, K. Yamazaki, and S. Ohiwa: “Comparison of Magnetic Characteristics of Powder Magnetic Core and Evaluation of Motor Characteristics”, Trans. IEE of Japan, Vol. 125-D, No. 1, pp. 106-112 (2005-1) (in Japanese)