Kühni, Robert. "Iljushin Il-22". fliegerweb.com (in German). Archived from the original on 27 February 2012. Retrieved 27 February 2012 – via Wayback Machine.
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Kühni, Robert. "Iljushin Il-22". fliegerweb.com (in German). Archived from the original on 27 February 2012. Retrieved 27 February 2012 – via Wayback Machine.