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If content is copyrighted by a publisher or any other entity, then it should not be posted at LSU Digital Commons.
You may post a non-copyrighted version of content for which a publisher or another entity holds copyright. This varies by publisher. For example, an author may still have copyright for content that has not gone through a publisher's refereeing and copy editing. Some publisher copyright agreements may, for some versions of content, require a link to the final edition.