(1) M. Mizokami, M. Yabumoto, and Y. Okazaki: “Vibration Analysis of 3-Phase Model Transformer Core”, T. IEE Japan, Vol. 116-A, No. 8, pp. 744-749 (1996-8) (in Japanese)
(2) M. Ishida and K. Sato: “Influence of Higher Harmonics in Flux Density on Performance of Model 3-Phase Staked Transformer Core”, The Paper of Technical Meeting on Magnetics, IEE Japan, MAG-96-105 (1996) (in Japanese)
(3) H. Nagae, I. Komatsu, H. Watanabe, and T. Toda: “Comparison of Core Loss and Noise Level between Single-Phase Two-limbed Cores and Three-phase Two-limbed Cores”, The Paper of Technical Meeting on Magnetics, IEE Japan, MAG-96-106 (1996) (in Japanese)