Add jquery.archival.js to the end of a page containing at least one <article> element which contains a) a <time> element with itemprop="datePublished" and datetime attributes, and b) an element with an itemprop="articleBody" attribute.
It will add an extra icon to each link, visible on hover, linking to the Wayback Machine's closest archive of the linked page.
Note that the archive may be from a later date than the date the article was published, if that date is closer than an earlier date.