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https://journal.fi/fuf/article/view/114328/?acceptCookies=1 The development of vowel harmony in Proto-Uralic and Proto-Finno-Ugrian | Finnisch-Ugrische... the development vowel harmony proto uralic finno https://m2.mtmt.hu/api/publication/35649584 MTMT2: Rácz Péter et al. Lexical patterns in Hungarian vowel harmony. (2026) CORPUS LINGUISTICS AND... et al in hungarian vowel harmony corpus linguistics lexical