Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Iwaya Kazuki and Takahashi Isao,Switching Type Power Amplifier Using Multilevel Inverter,IEEJ Transactions on Industry Applications,09136339,The Institute of Electrical Engineers of Japan,2003,123,11,1339-1344,https://cir.nii.ac.jp/crid/1390282679633058560,https://doi.org/10.1541/ieejias.123.1339