You probably won't need this information anymore but I run into the same question and got some result that I want to share. Though it didn't work to address a specific article by opening that url directly in a browser, I found that you can address a specific article by using the method "goToDocumentByURL" of the treesaver framework with an url following the patter:
var url = protocol + domain + path + filename + '#' + articleId;
e.g.
the method "goToDocumentByURL" is exposed as "treesaver.goToDocumentByURL" and can be called anywhere in your code with JavaScript like this:
treesaver.goToDocumentByURL(url);