Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) 廣瀬 圭一,Trends in Utilization of Direct Current Power,The Journal of the Institute of Electrical Installation Engineers of Japan,09100350,The Institute of Electrical Installation Engineers of Japan,2021,41,2,83-95,https://cir.nii.ac.jp/crid/1390850092195444608,https://doi.org/10.14936/ieiej.41.83