Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Richard Nicollas and Renaud Garrel and Maurice Ouaknine and Antoine Giovanni and Bruno Nazarian and Jean-Michel Triglia,Normal Voice in Children Between 6 and 12 Years of Age: Database and Nonlinear Analysis,Journal of Voice,0892-1997,Elsevier BV,2008-11,22,6,671-675,https://cir.nii.ac.jp/crid/1360292621565656832,https://doi.org/10.1016/j.jvoice.2007.01.009