Gregory the Great : perfection in imperfection - Straw, Carole. (OLS)http://ftis/name/61991 (University of California Press,, 1988)

Tipologia della cultura - Lotman, Jurij M. (OLS)http://ftis/name/82851; Marzaduri, Marzio. (OLS)http://ftis/name/82920; Faccani, Remo. (OLS)http://ftis/name/82919; Uspenskij, Boris A. (OLS)http://ftis/name/82918 (Bompiani,, 1975)