Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Willemijn F. L. Heeren,Coding pitch differences in voiceless fricatives: Whispered relative to normal speech,The Journal of the Acoustical Society of America,0001-4966,Acoustical Society of America (ASA),2015-12-01,138,6,3427-3438,https://cir.nii.ac.jp/crid/1360017289285272832,https://doi.org/10.1121/1.4936859