Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Kaoru Koyanagi and Toshihisa Funabashi and Ryuichi Yokoyama and Goro Fujita and H. Otoguro,An influence of voltage sag duration on nonutility generator's shaft torque,2000 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.00CH37077),,IEEE,2002-11-07,1,,153-158,https://cir.nii.ac.jp/crid/1873116918088064768,https://doi.org/10.1109/pesw.2000.849946