I scanned my linklist and found this.
A blog: What makes agile testing different? (Huib Schoots)
A set of slides by Markus Gärtner
And finally these two are about testing in the agile quadrants:
Let’s break the Agile Testing Quadrants (Gojko Adzic)
Breaking down the Agile Testing Quadrants (John Stevenson)
There are lots of good links in those articles. So I guess you will find more than enough information from that start point.
Good luck with your application.