Professor Jonathan Zittrain, Kendra Albert, and Professor Lawrence Lessig, all of Harvard University, have posted Perma: Scoping and Addressing the Problem of Link and Reference Rot in Legal Citations.
Here is a summary:
We document a serious problem of reference rot: more than 70% of the URLs within the Harvard Law Review and other journals, and 50% of the URLs found within U.S. Supreme Court opinions do not link to the originally cited information. [...]
In response, the Harvard Library Innovation… [read post