Kallis, Aristotle (2000). Fascist Ideology: Territory and Expansionism in Italy and Germany, 1922-1945. Routledge. [3]
Burleigh, Michael (1988). Germany Turns Eastwards: A Study of Ostforschung in the Third Reich. Cambridge University Press, p. 142.[5]
Manoschek, Walter (1995). "Serbien ist judenfrei": militärische Besatzungspolitik und Judenvernichtung in Serbien 1941/42. Oldenbourg Wissenschaftsverlag, p. 27.[6]
MacDonald, Michael H. (1996). Europe: A Tantalizing Romance. Past and Present Europe for Students and the Serious Traveller. University Press of America, p. 128. [7]
Louis de Jong (1969). Het Koninkrijk der Nederlanden in de tweede wereldoorlog: Voorspel. M. Nijhoff, p. 97. [9]
De Jong, L. (1974). The Kingdom of the Netherlands in the Second World War: March '41 - July '42. Volume 5 part 1. Martinus Nijhoff, p. 245. [10] (en danés)
J.Th. Leerssen, Joseph Theodoor Leerssen, Manet van Montfrans (1993). Borders and territories., pp. 38-39. [11] (en francés)