1. Andersson, F.: Estimation of the quality of hyperlinked documents using a series formulation of PageRank. Master Thesis at the Centre for Mathematical Sciences, Faculty of Engineering, Lund University (2006)
2. Classics in Applied Mathematics;R. Bellman,1997
3. Classics in Applied Mathematics;A. Berman,1994
4. Billingsley, P.: Ergodic Theory and Information. Wiley, New York (1965)
5. Wiley Series in Probability and Statistics: Probability and Statistics;P. Billingsley,1999