Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) NORIMATSU Tatsuki and MOGI Kazuo,Stability Criteria for A Velocity Servo System whose D. C. Tachometer Generator shows Rippled Output,Automatic Control,0447-7235,THE SOCIETY OF INSTRUMENT AND CONTROL ENGINEERS,1956,3,1,21-23,https://cir.nii.ac.jp/crid/1390282680335342464,https://doi.org/10.11499/sicejl1954.3.21