Similarly, newspapers routinely credit news articles written by their staff, and publishers credit the writers and illustrators who produce comic books featuring characters such as Batman or Spider-Man, but the publishers hold copyrights to the work. However, articles published in academic journals, or work produced by freelancers for magazines, are not generally works created as a work for hire, which is why it is common for the publisher to require the copyright owner, the author, to sign a copyright transfer, a short legal document transferring specific author copyrights to the publisher. In this case the authors retain those copyrights in their work not granted to the publisher.