@misc{HartmannMastFischer2018,
  author    = {Matthias Hartmann and Fred W. Mast and Martin H. Fischer},
  title     = {Spatial biases during mental arithmetic},
  booktitle = {Postprints der Universit{\"a}t Potsdam : Humanwissenschaftliche Reihe},
  number    = {426},
  institution = {Humanwissenschaftliche Fakult{\"a}t},
  series    = {Zweitver{\"o}ffentlichungen der Universit{\"a}t Potsdam : Humanwissenschaftliche Reihe},
  number    = {426},
  type      = {postprint},
  pages     = {8},
  year        = {2018},
}