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2. Arnheim, Louise: Henri Nathansens forhold til Zionismen. DJH 30, 42–54 (1990).
3. Bamberger, Ib Nathan: The Viking Jews. A history of the Jews of Denmark. New York: Shengold, 1983.
4. Bickel, Cornelius, and Rolf Fechner eds.: Ferdinand Tönnies, Harold Høffding Briefwechsel. Berlin: Duncker and Humblot, 1989.
5. Bille, Mogens: Censor om Indenfor murene. DJH 21, 11–17 (1986).