Forum Moderators: not2easy
Ask permission first. They might give it to you.
One solution would be to create your own abstract of the article. Which you could write to be keyword-rich, of course.
So if you do it ans get caught, it would be bad for your site.
so you can simply ask for their permission in return to re-print the whole article and leaving all references intact.
Better still there are sites wher you get articles which you can use fr your website.
but i would recommend you to write your own/or hire someone to write fresh content or articles for you. this will help you to avoid penalize for duplication by google