↑ Oxford Dictionary of National Biography: "His grandfather Jacob had established the family as one of the first Jewish families to acquire great wealth and social acceptability in Bavaria ... His mother came from an Orthodox Frankfurt family and ensured that the children were properly instructed in Jewish matters ... he moved to Paris ... He was a well-known and ubiquitous member of the smart set in Paris"
↑ Goodwin, George M (1998). "A New Jewish Elite: Curators, Directors, and Benefactors of American Art Museums". Modern Judaism. 18 (1): 119–152. doi:10.1093/mj/18.2.119. ProjectMUSE22042.
↑ Spunder, Or (24 January 2008). הקשר ג'ונתן אסוס מועמד למכבי ת"א (in Hebrew). One.co.il. Retrieved 28 January 2008. קשרה היהודי/צרפתי של ראים מהליגה ה-2 בצרפת עשוי להגיע להתרשמות במכבי.
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