BienvenuST12'

@article{DBLP:journals/mst/BienvenuST12,
  author    = {Laurent Bienvenu and
               Frank Stephan and
               Jason Teutsch},
  title     = {How Powerful Are Integer-Valued Martingales?},
  journal   = {Theory Comput. Syst.},
  volume    = {51},
  number    = {3},
  year      = {2012},
  pages     = {330-351},
  ee        = {http://dx.doi.org/10.1007/s00224-011-9362-3},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}