A recent blog post on “Research Tips” by the Moritz Legal Information Blog, run by the Moritz Law Library at The Ohio State University, highlights Perma.cc as a method to find or create a permanent url, because “adding them to citations is becoming an increasingly common practice for authors who cite online content.”
Academics and journals at Ohio State have used Perma extensively to back-up their web citations. Get started yourself by signing up for a free account here!