* [https://books.google.pl/books?id=AoWlCmNDA3QC&lpg=PT504&pg=PT504 Pretzel; in: The Oxford Companion to American Food and Drink]
* [https://books.google.pl/books?id=bIIeBQAAQBAJ&lpg=PA652&pg=PA652 Pretzel; in: The Oxford Companion to Food]
* [https://books.google.pl/books?id=hCegCgAAQBAJ&lpg=PA353&pg=PA353 Lox; in: Savoring Gotham: A Food Lover's Companion to New York City]