Trubachyov, Oleg, editor (1980), “*gręznǫti”, in Этимологический словарь славянских языков [Etymological dictionary of Slavic languages] (in Russian), numbers 7 (*golvačь – *gyžati), Moscow: Nauka, page 125
Vasmer, Max (1964–1973) “гря́знуть”, in Oleg Trubachyov, transl., Этимологический словарь русского языка [Etymological Dictionary of the Russian Language] (in Russian), Moscow: Progress
^ Derksen, Rick (2008) “*grę̑znǫti”, in Etymological Dictionary of the Slavic Inherited Lexicon (Leiden Indo-European Etymological Dictionary Series; 4), Leiden, Boston: Brill, →ISBN, page 188: “v. (c) ‘sink’”
^ Olander, Thomas (2001) “gręznǫti: gręznǫ gręznetь”, in Common Slavic Accentological Word List[1], Copenhagen: Editiones Olander: “b (SA 211, 259; PR 137)”
^ Snoj, Marko (2016) “grẹ́zniti”, in Slovenski etimološki slovar [Slovenian Etymology Dictionary] (in Slovene), 3rd edition, https://fran.si: “*gręznǫ̋ti”