Westerkamp, D. Naming and tetragrammatology: Medieval apophatic philosophy and its double helix. Jewish lifeworlds and Jewish thought : Festschrift presented to Karl E. Grözinger on the occasion of his 70th birthday.

Westerkamp, Dirk. "Naming and Tetragrammatology: Medieval Apophatic Philosophy and Its Double Helix." Jewish Lifeworlds and Jewish Thought : Festschrift Presented to Karl E. Grözinger on the Occasion of His 70th Birthday .

Westerkamp, Dirk. "Naming and Tetragrammatology: Medieval Apophatic Philosophy and Its Double Helix." Jewish Lifeworlds and Jewish Thought : Festschrift Presented to Karl E. Grözinger on the Occasion of His 70th Birthday, .