Charles Jacobs; et al. <a href="http://grail.cs.washington.edu/pub/papers/Jacobs2003.pdf">&ldquo;Adaptive Grid Based Document Layout&rdquo;</a> in: <cite>ACM Transactions on Graphics.</cite> 22. 3. pp. 838&#8211;847. July 2003. URL: <a href="http://grail.cs.washington.edu/pub/papers/Jacobs2003.pdf">http://grail.cs.washington.edu/pub/papers/Jacobs2003.pdf</a>