Röll, W. (1985). The Kassel "Ha-Massef" of 1799: An unknown contribution to the Haskala. The Jewish response to German culture : from the enlightenment to the Second World War.

Röll, Walter. "The Kassel "Ha-Massef" of 1799: An Unknown Contribution to the Haskala." The Jewish Response to German Culture : From the Enlightenment to the Second World War 1985.

Röll, Walter. "The Kassel "Ha-Massef" of 1799: An Unknown Contribution to the Haskala." The Jewish Response to German Culture : From the Enlightenment to the Second World War, 1985.