Dynamics of tournaments: the soccer case - A random walk approach modeling soccer leaguesH. V. Ribeiro, R. S. Mendes, L. C. Malacarne, S. Picoli and P. A. SantoroEur. Phys. J. B, 75 3 (2010) 327-334DOI: https://doi.org/10.1140/epjb/e2010-00115-5