'All text is available under the terms of the GNU Free Documentation License' at the bottom of every page
See Section 4.K on the wikipedia hosted page [1]
http://en.wikipedia.org/wiki/Wikipedia:Text_of_the_GNU_Free_Documentation_Li...
I was never shown the "no invariant sections" statement when I contributed my past entries, and to change the license would be to relicence everyones contributions...
It is entirely logical that if someone is contributing as part of an academic grant that they should be able to acknolwedge that.
Follow the footnote, it says:
"^ GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, with no Front-Cover Texts, and with no Back-Cover Texts."