著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) ITAKURA F.,A statistical method for estimation of speech spectral density and formant frequencies,"Electronics and Communications in Japan, A",,,1970,53,1,36-43,https://cir.nii.ac.jp/crid/1571417125569472640,