Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) HORIGUCHI Kazumi and TAKAHARA Hidekazu,Discrete-Time Model Reduction using the Sine-Wave Response Gramian,"Transactions of the Institute of Systems, Control and Information Engineers",13425668,"THE INSTITUTE OF SYSTEMS, CONTROL AND INFORMATION ENGINEERS (ISCIE)",2008,21,10,336-338,https://cir.nii.ac.jp/crid/1390001205164553216,https://doi.org/10.5687/iscie.21.336