Allan Borodin Gareth O. Roberts Jeffrey S. Rosenthal Panayiotis Tsaparas Link analysis ranking: algorithms, theory, and experiments. 231-297 2005 5 ACM Trans. Internet Techn. 1 http://doi.acm.org/10.1145/1052934.1052942 db/journals/toit/toit5.html#BorodinRRT05