Max Vasmer (1953–1958). Russisches etymologisches Wörterbuch (dalam bahasa Jerman). Heidelberg: Winter."Форшмак". Этимологический словарь русского языка. Russian translation by Oleg Trubachyov. Moscow: Progress. 1964–1973.
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books.google.de
Gil Marks. Encyclopedia of Jewish Food. Houghton Mifflin Harcourt, 2010. Forshmak