It is the same problem as in the srfi-1
Perhaps, it could be replaced with a wikipedia link
Thanks. I've fixed that HyperSpec link and similar links in SRFIs 13, 32, 33, 34, 35, 56, 76, 130, 135, and 166. I've also updated the link in SRFI 1 to point not to Wikipedia, but to a current copy of the HyperSpec.