Classen, A. (2017). Rabbi Nissim and his influence on medieval German literatur: Rudolf von Ems's "Der guote Gêrhart" and Heinrich Kaufringer's "Der Einsiedler und der Engel" ; Jewish wisdom teachings in the middle high and early modern German context / Albrecht Classen. Aschkenas.

Classen, Albrecht. "Rabbi Nissim and His Influence on Medieval German Literatur: Rudolf Von Ems's "Der Guote Gêrhart" and Heinrich Kaufringer's "Der Einsiedler Und Der Engel" ; Jewish Wisdom Teachings in the Middle High and Early Modern German Context / Albrecht Classen." Aschkenas 2017.

Classen, Albrecht. "Rabbi Nissim and His Influence on Medieval German Literatur: Rudolf Von Ems's "Der Guote Gêrhart" and Heinrich Kaufringer's "Der Einsiedler Und Der Engel" ; Jewish Wisdom Teachings in the Middle High and Early Modern German Context / Albrecht Classen." Aschkenas, 2017.