Template:R:HPUL
Sammallahti, Pekka (1988年)， “Historical Phonology of the Uralic Languages”，Denis, Sinor, 编，The Uralic Languages: Description, History and Foreign Influences，Leiden：E. J. Brill，ISBN 9004077413，第 478-554 頁
Sammallahti, Pekka (1988年)， “Historical Phonology of the Uralic Languages”，Denis, Sinor, 编，The Uralic Languages: Description, History and Foreign Influences，Leiden：E. J. Brill，ISBN 9004077413，第 478-554 頁