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)