Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Hiroshi Uchino and Ryoichi Kurosawa and Takeo Shimamura and M. Hirano,Parallel operation of active and passive filters for variable speed cycloconverter drive systems,15th Annual Conference of IEEE Industrial Electronics Society,,IEEE,2003-01-13,,,186-191,https://cir.nii.ac.jp/crid/1873398392766886528,https://doi.org/10.1109/iecon.1989.69632