(1) Y. Mochinaga, et. al: “Development of Single Phase Feeding Power Conditioner for Shinkansen Depot.”, IEEJ Trans. on PE, Vol. 120, No. 8/9, pp. 1084-1090 (2000) (in Japanese)
(2) K. Muraoka, et. al: “Proposal of an Active Filter Needless to Detect Current Harmonics”, in Proceeedings of the 2003 Japan Industry Applications Society Conference, Y-54 (2003) (in Japanese)