[Thibault-Fallows 1991] proposes attribution to Barbingant
V-CVbav-ms-Arch.Cap.S.Pietro.B.80: Patrem: P-initial: 'Omnia vincit amor et noscedamus'; Above initial: A.P.P. / Pleni: [Superius] and 'Cont[ra ten]or': 'Duo' / Benedictus: [Superius] and 'Cont[ra ten]or': 'Duo'; 'Osanna ut [supra]' / Agnus II: [Superius] and 'Cont[ra ten]or': 'Duo'