This article draws heavily on the corresponding article in the German-language wikipedia.

This article draws heavily on the corresponding article in the German Wikipedia, retrieved April 24, 2005.

This article draws on the corresponding article in the 'Jewish Encyclopedia'

This article draws on the corresponding article in the French Wikipedia, accessed 31 July 2006.

This article draws on the corresponding article in the Spanish Wikipedia, retrieved March 1, 2005.

This article draws heavily on the article of the same name in the Italian Wikipedia.

This article draws heavily on the corresponding article in the German Wikipedia, as of 21 January 2005.

This article draws heavily on the corresponding article in the German Wikipedia, retrieved March 2, 2005.

This article draws heavily on the corresponding article in the French Wikipedia, retrieved April 9, 2005.

This article draws heavily on the corresponding article in the German Wikipedia.