Information filtering via Iterative Refinement
  With the explosive growth of accessible information, expecially on the Internet, evaluation-based filtering has become a crucial task. Various systems have been devised aiming to sort through large volumes of information and select what is likely to be more relevant. In this letter we analyse a new ranking method, where the reputation of information providers is determined self-consistently. 
P. Laureti, L. Moret, Y.-C. Zhang, Y.-K. Yu