The earliest Wayback Machine archive of that link is from August 2000: https://web.archive.org/web/20000824013718/http://research.microsoft.com/~toddpro/papers/

The earliest Wayback Machine archive of that link is from August 2000: https://web.archive.org/web/20000824013718/http://research.microsoft.com/~toddpro/papers/law.htm https://web.archive.org/web/20000824013718/http://research.m... Looks like in December 2008 (between https://web.archive.org/web/20081204015038/http://research.microsoft.com/~toddpro/papers/law.htm https://web.archive.org/web/20081204015038/http://research.m... which works, and the next snapshot on Dec 30) it started redirecting to a new URL (https://web.archive.org/web/20090224224249/http://research.microsoft.com/en-us/um/people/toddpro/papers/law.htm https://web.archive.org/web/20090224224249/http://research.m...) which was still working as of 2012-03 (https://web.archive.org/web/20120307142916/http://research.microsoft.com/en-us/um/people/toddpro/papers/law.htm https://web.archive.org/web/20120307142916/http://research.m...). Meanwhile, https://proebsting.cs.arizona.edu/ https://proebsting.cs.arizona.edu/ says that Todd Proebsting joined the University of Arizona in August 2012 after leaving Microsoft, so presumably that's when the link stopped working. He still has it up at his new site: https://proebsting.cs.arizona.edu/law.html https://proebsting.cs.arizona.edu/law.html