La filosofia del Cristianesimo / Guido de Ruggiero. - De Ruggiero, Guido, 1888-1948. (OLS)http://pul/name/5898 (Laterza, 1967)
Bibliography: p. 681-[704]

Descartes : a study of his philosophy / Anthony Kenny. - Kenny, Anthony John Patrick. (OLS)http://pul/name/43317 (St. Augustine's Press, 2009)
Bibligrafia nelle note.