B
[BV07] Henrik Björklund and Sergei Vorobyov. A combinatorial strongly subexponential strategy improvement algorithm for mean payoff games. Discrete Applied Mathematics 155(2):210-229. Elsevier, January 2007. 
@article{dam155(2)-BV,
  author =              {Bj{\"o}rklund, Henrik and Vorobyov, Sergei},
  title =               {A combinatorial strongly subexponential strategy
                         improvement algorithm for mean payoff games},
  publisher =           {Elsevier},
  journal =             {Discrete Applied Mathematics},
  volume =              {155},
  number =              {2},
  pages =               {210-229},
  year =                {2007},
  month =               jan,
  doi =                 {10.1016/j.dam.2006.04.029},
}
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