Original: Cappella Coloniensis. Gabriele Ferro. 1954-2004. Choir sheet music. Cappella Coloniensis. 1954-2004. by Paolo Barbacini.
Traducere: Chapel Coloniensis. Partituri cor. Chapel Coloniensis. de Paul Barbacini. Ulf Bjorlin. Chapel Coloniensis. Cologne Camera Corul.
