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Alternatively, you could keep all of your text files, including the text of the article, on GitHub. You check in your text like you check in your code and you can use git diff or your GUI tool to see changes between versions of the text. You have just one version of the file, the most recent one, in your directory. Thus far, for me, a barrier to keeping text files in GitHub is that I cannot link references in a text file to the zotero database. There are some potential advantages of keeping text in GitHub however. If we overcome the problem with references and develop systems for keeping our text in GitHub, we will report back.