1 2 Trevor-Roper 2012, pp. 79–82. ↑ Irving 1991, p. 697. ↑ Bullock 1992, p. 803. ↑ Trevor-Roper 2012, p. 82. 1 2 3 4 Doyle 2005, p. 8/8 in PDF. sfn error: no target: CITEREFDoyle2005 (help) 1 2 Breitenbach, Dagmar (9 September 2015). "A fresh light on the Nazis' wartime drug addiction".