Efron, J. M. (1992). The "Kaftanjude" and the "Kaffeehausjude": Two models of Jewish insanity : a discussion of causes and cures among German-Jewish psychiatrists. Year Book / Leo Baeck Institute.

Efron, John M. "The "Kaftanjude" and the "Kaffeehausjude": Two Models of Jewish Insanity : A Discussion of Causes and Cures Among German-Jewish Psychiatrists." Year Book / Leo Baeck Institute 1992.

Efron, John M. "The "Kaftanjude" and the "Kaffeehausjude": Two Models of Jewish Insanity : A Discussion of Causes and Cures Among German-Jewish Psychiatrists." Year Book / Leo Baeck Institute, 1992.