The Russian Primary Chronicle, Laurentian Text. Translated and edited by Samuel Hazzard Cross and Olgerd P. Sherbowitz-Wetzor. Cambridge, MA: The Mediaeval Academy of America, 1953, p.122. Kissel is translated as "porridge" in this edition.
moje-dobroty.cz
Míček, Pavel (2 February 2012). "Krkonošské kyselo a Žurek Poľski" [Giant Mountain Kyselo and Polish Žurek] (in Czech). Retrieved 27 July 2012.
novinky.cz
Petrák, František (12 January 2012). "Svérázná krkonošská kuchyně" [Idiosyncratic Cuisine From the Giant Mountains] (in Czech). Retrieved 27 July 2012.
