With RAXO Load Module Position plugin you can create up to three module positions inside your Joomla article - "before-content", "after-content" and "inside-content" positions. And you can use any of them, or display two or three module positions at the same time.
After you create module positions you can insert in these module positions any module you like,
e.g. RAXO Related Articles. But it can be any other module as well.
See more details about this plugin on the site:
http://www.raxo.org/raxo-load-module-position.html
and in the documentation:
viewtopic.php?f=5&t=2893