Quoting "David Prévot" <taffit@debian.org>:
As already stated by some users[1,2], the Debian Reference Card URL[3] is down. Do you intend to restore it, or should the Reference Card be updated to point to the Debian URL[4]?
The latter. Please, feel free to change the URL in the refcard, I will put a permanent redirect on the old address these days. (Btw: At the Debian address there are only the PDFs, while the old page had a short description on how to print and use the refcard and translation statistics. Some day we should have this at the new address.)