5Middlebrook R D. Input Filter Considerations in Design and Application of Switching Regulators. IEEE Industry Applications Society Annual Meeting, 1979: 366-382.
6Jung-Won Kim,Hang-Seok Choi,Bo Hyung Cho. A novel droop method for converter parallel operation. IEEE Transaction on Power Electroics, Jan. 2002, 17( 1 ): 25-31.