This is foolish for several reasons. It’s an undue burden on authors to make them download and upload potentially a gigabyte of files (or more) from many different sources. It is also likely a copyright violation for many or the sources. This also makes it arbitrarily difficult to cite things like conference talks, which are not published texts.

There are already standard keys to index publications, like DOIs. Requiring a list of DOIs for citations would make a lot more sense and be somewhat feasible, but still doesn’t prevent errors in the author list given in the draft.