@article{HartmannMastFischer2015,
  author    = {Matthias Hartmann and Fred W. Mast and Martin H. Fischer},
  title     = {Spatial biases during mental arithmetic: evidence from eye movements on a blank screen},
  journal   = {Frontiers in psychology},
  volume    = {6},
  doi       = {10.3389/fpsyg.2015.00012},
  year      = {2015},
}