^ Boryś, Wiesław (2005) “prószyć”, in Słownik etymologiczny języka polskiego (in Polish), Kraków: Wydawnictwo Literackie, →ISBN, page 486
^ Martynaŭ, V. U., editor (1993), “парушы́ць”, in Этымалагічны слоўнік беларускай мовы [Etymological Dictionary of the Belarusian Language] (in Belarusian), volumes 8 (не́марач – пая́ць), Minsk: Navuka i technika, →ISBN