著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) HOLTZ J.,Methods for Speed Sensorless Control of AC Drives,"Proc. Int. Conf. IEEE PCC-Yokohama, 1993",,,1993,,,,https://cir.nii.ac.jp/crid/1574231875002755712,