2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/73754We extend Masuoka's Theorem [11] concerning the isomorphism between the group of invertible bimodules in a non-commutative ring extension and the group of automorphisms of the associated Sweedler's canonical coring, to the class of finite comatrix corings introduced in [6].10 pagesRings and Algebras16W30, 13B02text