Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) MITSUMAKI Tatsuo,A Performance Index Using a Concept of Frequency in Adaptive Control Systems,Transactions of the Japan Society of Mechanical Engineers,00290270,The Japan Society of Mechanical Engineers,1963,29,203,1255-1262,https://cir.nii.ac.jp/crid/1390001205157863168,https://doi.org/10.1299/kikai1938.29.1255