Britannica Concise Encyclopedia: Saadia ben Joseph: Short article on this philosopher and polemicist.
Jewish Encyclopedia: Saadia Ben Joseph: Detailed 1906 study of this exilarch's views, by Wilhelm Bacher.
Jewish Personalities Saadia Gaon: Brief article on his life and work, from the Rabbi Scheinerman's Home Page.
Jewish Virtual Library: Saadia Gaon: Concise biography noting his place in Jewish history.
Project Tapestry: Saddia Ben Joseph in Jewish Philosophy: Student project by Rachael Sanford. Includes biography, links and discussions of his Book Of Doctrines And Beliefs.
Rabbi Saadia Gaon: Short article on this Jewish leader in historical context.
Saadia Gaon's Kavod Nivra and Its Place in His Philosophy of Judaism: A 1994 paper by Jay Michaelson, analyzing Saadia's reinterpretation of revelation.
Saadya: Detailed study of this medieval thinker, from the Stanford Encyclopedia of Philosophy. By Sarah Pessin.