This paper on a Zooming Web Browser is part of an enormous network of citations to papers about networks, interfaces, and information presentation. (The network, by the way, is an enormously fun way of browsing a lot of papers. The UI leaves a lot to be desired though. On citation list pages, the work 'Doc' to the left of the title is hotlinked when the paper is available online; on document pages, read by clicking one of the cached document formats list in the top right -- just so you know.)