Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Kumagai Kiyoshi and Ikeno Kazuo,The improvement in Halsey's pitch extraction method.,THE JOURNAL OF THE ACOUSTICAL SOCIETY OF JAPAN,03694232,Acoustical Society of Japan,1960,16,4,274-276,https://cir.nii.ac.jp/crid/1390001206564557184,https://doi.org/10.20697/jasj.16.4_274