The paper On local estimations of PageRank: A mean field approach with Santo Fortunato, Marian Boguna and Sandro Flammini has finally appeared in the journal Internet Mathematics. It is an extended version of “Approximating PageRank from in-degree” presented at WAW2006.
Building Better Search Engines by Pam Frost Gorder in Computing in Science and Engineering, vol. 9, no. 4, pp. 7-11, Jul/Aug 2007