Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Kato Shuhei and Takaku Taku and Sumitani Hideo and Shimada Ryuichi,Development of Voltage Sag Compensator and UPS using a Flywheel Induction Motor and an Engine Generator,IEEJ Transactions on Industry Applications,09136339,The Institute of Electrical Engineers of Japan,2007,127,8,844-850,https://cir.nii.ac.jp/crid/1390001204659008256,https://doi.org/10.1541/ieejias.127.844