public function ListArticlesAction()
    {
        if($this->_request->IsXHttpRequest)
        {
            return;
        }

        //Code

        return json_encode($this->_articles);
    }

    public function LoadArticlesAction()
    {
        if(!$this->_request->IsXHttpRequest)
        {
            return;
        }

        //code

        return json_encode($this->_articles);
    }