Did you try http://scg.unibe.ch/download/classboxes/ ?

--sumim


2012/11/7 rettich <c.ramson at yahoo.de>:
> Therefore I was looking for the
> implementation, but I could not find a download link (only some dead links
> like http://www.iam.unibe.ch/~scg/Research/Classboxes/classbox.zip). Is
> there a possibilty to get the code or a squeak image with included code for
> classboxes?