Users guide: broken external links
Section 10.9 'Type Families' intro has external links to three papers, labelled
[AssocDataTypes2005] [AssocTypeSyn2005] [TypeFamilies2008]
The links point to http://www.cse.unsw.edu.au/\~chak/papers/....html. I get Access Forbidden Error 403.
Instead they could point to the microsoft research publications versions(?) (Each is co-authored by Chak and SPJ and others.) But beware some of those are draft versions.