To share an Article you can attach it to a post or reply in the Feed. To do so, simply click the Article icon in the Composer, then search for the Article by Article name, author name or Article contents. Select the desired Article from the list of matches, then click Attach. When your message is created, a link to that Article will be included at the bottom of the post/reply. 

Clicking the link will display the Article in a pop-up screen over the Feed allowing the viewer to read the Article then easily return to their place in the Feed.