The U.Porto Repository is a service of the University of Porto which aims to aggregate its institutional repositories: the Open Repository, that collects, preserves and provides the intellectual production, most of the documents in full text and open access, of the academic community of U.Porto; the Thematic Repository, that stores, preserves and provides informational resources produced by U.Porto in definite areas or for specific audiences. The literary works stored in the U.PORTO repositories are covered by the Creative Commons public licence or protected by copyright and/or other applicable law. Any use of the literary work that is not authorised by this licence or in the terms accepted by copyright law is explicitly prohibited. When accessing the literary work, the user accepts the terms of this licence and agrees to be bound by them.