Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) FOLDVIK A. K.,Three-dimensional ultrasound and magnetic resonance imaging: A new dimension in phonetic research,Proc. 12th Int. Congr. Phonetic Sciences,,,1995,4,,46-49,https://cir.nii.ac.jp/crid/1571698599324806656,