Need Help About NURBs

Hi, I’m Doing Exegesis About NURBs… have anyone knows any books or any research document About that.
not only modeling it’s can be theory… or new kind of idea in any area…

could you please send me an email, post it , pm or any thing will be regraded

Due of this exegesis 10 june 2010

Good book: http://www.amazon.com/Focus-Curves-Surfaces-Game-Development/dp/159200007X