You can often find the papers by searching on either CiteSeer (http://citeseerx.ist.psu.edu/ http://citeseerx.ist.psu.edu/) or Google Scholar. On the latter, cl

You can often find the papers by searching on either CiteSeer (http://citeseerx.ist.psu.edu/ http://citeseerx.ist.psu.edu/) or Google Scholar. On the latter, click "All X versions" - there are often copies on authors' faculty pages, for example, before the ACM took something free and locked it up.