Theo Bruns. Der Vatikan und die Rattenlinie. Wie die katholische Kirche Nazis und Kriegsverbrecher nach Südamerika schleuste. Das Lateinamerika-Magazin, 2010. Truy cập 1/04/2019.
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Erika Weinzierl, Kirche und Nationalsozialismus, with photos of Hudal, Archbishop Innitzer and fac-simile of several documents concerning the Anschluss, namely a welcome letter by the Austrian Bishops collectively (The "Solemn Declaration" of ngày 18 tháng 3 năm 1938) and a letter to the Gauleiter by Archbishop Innitzer individually, with the famous final handwritten phrase: "und Heil Hitler!".
