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Techniques and criteria for oral proficiency assessmentKokkota, ValmarV Regional Seminar East-West Meeting of Language Testing, Tallinn, September 2-4, 1991 : summaries1991 / p. 58-61

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VOXLINGUA107 : A dataset for spoken language recognitionValk, Jörgen; Alumäe, TanelIEEE Spoken Language Technology Workshop2021 / p. 652-658 https://doi.org/10.1109/SLT48900.2021.9383459