Blažek, V. 1990, New Fenno-Ugric-Indo-Iranian Lexical Parallels. — Uralo-Indogermanica. Part II, Moscow.
Blažek, V. 1999. Numerals. Comparative-Etymological Analyses of Numeral Systems and Their Implications (Saharan, Nubian, Egyptian, Berber, Kartvelian, Uralic, Altaic and Indo-European Languages), Brno, Spisy Masarykovy univerzity v Brně. Filozofická fakulta, 322.
Erdődi, J. 1970, Selkupisches Wörterverzeichnis. Tas-Dialekt, Bloomington (UAS 103).
Etymologisches Wörterbuch des Ungarischen, Budapest 1992—1994 (= EWU).
Honti, L. 1993, Die Grundzahlwörter der uralischen Sprachen, Budapest.
Janhunen, J. 1977, Samojedischer Wortschatz. Gemeinsamojedische Etymologien, Helsinki (Castrenianumin toimitteita 17).
Kovács, F. 1960, Some remarks on Uralic numerals. - AlHung. 10, 117-129.
Napolskikh, V. V. 1995, Uralic ’seven’. - JSFOu 86, 119-128.
Rédei, K. 1965, Szófejtések. - NyK 67, 117-129, 324-338.
Sammalahti, P. 1988, Historical Phonology of the Uralic Languages. - The Uralic Languages. Description, History and Foreign Influences, Leiden-New York-København-Köln, 478-554.
https://doi.org/10.1163/9789004492493_021
Мудрак O. 2000, Этимологический словарь чукотско-камчатскихязыков, Москва.
Хелимский Е. А. 2000, Компаративистика, уралистика. Лекции и статьи, Москва.