^Milekic, Sven (6 October 2014). "WWII Children's Concentration Camp Remembered in Croatia". Balkan Insight. Balkan Investigative Reporting Network (BIRN). Retrieved 3 March 2018. "We had a similar treatment [in Auschwitz] as children in the Ustasa-German camp in Sisak," said the Croatian-born Lustig. "They had doctor [Antun] Najzer [the camp's commander], we had the infamous doctor Mengele," he said.
^"Logori u Sisku i Capragu" [Camps in Sisak and Caprag]. jadovno.com (in Serbian). 2 September 2014. Retrieved 3 March 2018.