* قائمة بالمذابح الواقعة في صربيا* 21 October Museum website* “Case Studies in Serbian Historical Consciousness: The Kragujevac Massacre” by Sarah O'Keeffe* Krvava srpska jesen 1941. godine ("Bloody Spring in Serbia")* Kragujevac Massacre (quotations overview)* Book of poetry: "The Blue Butterfly by Richard Berengarten