Dante's angelic intelligences : their importance in the cosmos and in pre-christian religion / Stephen Ambrose. - Bemrose, Stephen. (OLS)http://pul/name/47617 (Edizioni di Storia e Letteratura, 1983)
Bibliografia in nota.

Encyclopedia of modern jewish culture / edited by Glenda Abramson. - Abramson, Glenda. (OLS)http://pul/name/54694 (Routledge, 2005)
Bibliografia in nota.