"The Warsaw ghetto : a guide to the perished city / B. Engelking, J. Leociak. – New Haven, 2009. – p. 841" . "Illegal cultural organization Idisze Kulturorganizacje was set up in 1941-12 with membership drawn from the Jewish Social Self-Help and the house committees. The aim of YIKOR was to propagate Yiddish culture and language among the inhabitants of the ghetto. It organized concerts, talks and lectures, and evenings about eminent figures in Yiddish culture and language. YIKOR supported clandestine schools with Yiddish as the language of instruction, set up an illegal library, and organized a competition for the best literary and academic work about the ghetto."@eng . "Idisze Kulturorganizacje"@eng . .