Liberman, Anatoly. «On boasting, fear, shouting, and poetry. Engl. brag, Engl. brawl, OE brōga, and OI bragr/Bragi . 369». в Essays in the History of Languages and Linguistics: Dedicated to Marek Stachowski on the Occasion of His 60th Birthday, под редакцией Michał Németh, Barbara Podolak, Mateusz Urban, и Dariusz R. Piwowarczyk. Poland: Księgarnia Akademicka Publishing, 2017. просмотрено ноябрь 6, 2026. https://books.akademicka.pl/publishing/catalog/book/484/chapter/10800.