Krylov, G. A. (2004) “сука”, in Этимологический словарь русского языка [Etymological Dictionary of the Russian Language] (in Russian), Saint Petersburg: Victory, →ISBN, page 381
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Krylov, G. A. (2004) “сука”, in Этимологический словарь русского языка [Etymological Dictionary of the Russian Language] (in Russian), Saint Petersburg: Victory, →ISBN