You might find "Genetic Programming: an Introduction" a better read.
Also there are two free books with a short discussion of ADFs:

A Field Guide to GP:
http://www.gp-field-guide.org.uk/
My book:
http://cs.gmu.edu/~sean/book/metaheuristics

Sean

On Mar 6, 2010, at 8:31 AM, Magnus Johansson wrote:

> Hello everybody,
>
> I've come to the stage where I feel I really need to improve my
> knowledge about the ADF-functionality. The only information I've
> found online is to brief. I'd like to read a more throughly
> "explanation".
> Does anyone have any suggestions for a good online explanation or is
> the best way to read Kozas book directly? ( Genetic Programming II:
> Automatic Discovery of Reusable Programs ).
>
> Best Regards
> Magnus Johansson