Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) TSUDA Koji,Subspace Method in the Hilbert Space,IEICE technical report. Neurocomputing,,"The Institute of Electronics, Information and Communication Engineers",1998-07-27,98,219,47-54,https://cir.nii.ac.jp/crid/1574231877214030592,