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 * [ ] Website support.
 * [ ] Add other features available in the `cybersni` repository.
 * [ ] Add a small reference to the Bookup website in the book frontmatter?
-* [ ] Improve the documentation.
+* [ ] Improve the documentation, including:
+  * [ ] Repository URL.
+  * [ ] Livros que usam Bookup.
+  * [ ] Projetos semelhantes:
+    * [ ] [Repositórios da Editora Hedra](https://github.com/hedra-editora).
 
 ## Issues