Willelmi Tyrensis archiepiscopi Chronicon - Huygens, Robert B.C. (OLS)http://ftis/name/53916; Rösch, G. (OLS)http://ftis/name/53918; Mayer, H.E. (OLS)http://ftis/name/53917 (Typographi Brepols editores pontificii, 1986)

Chiesa e politica - Guzzetti, Giovanni Battista <1912-1996>. (OLS)http://ftis/name/51965 (Marietti, 1975)