Vienna City Library, Manuscript department, H.I.N. 18845 ↑ Friederich Kunz: Die Strudelfamilie - eine Wiener Mehlspeisendynastie mit orientalisch-europäischem Stammbaum, in "backwaren aktuell", 2/11 ↑ "Words in English: Loanwords". rice.edu. ↑ Oxford English Dictionary, second edition. 1989. ↑ From Old High German stredan "to bubble, boil, whirl, eddy", according to etymonline. ↑ Seebold, Elmar. 1999.