@article{FerreinBeckLakemeyer2009,
  author    = {Ferrein, Alexander and Beck, Daniel and Lakemeyer, Gerhard},
  title     = {Landmark-Based Representations for Navigating Holonomic Soccer Robots / Beck, Daniel ; Ferrein, Alexander ; Lakemeyer, Gerhard},
  series = {RoboCup 2008 : robot soccer world cup XII / Luca Iocchi ... (eds.)},
  journal   = {RoboCup 2008 : robot soccer world cup XII / Luca Iocchi ... (eds.)},
  publisher = {Springer},
  address   = {Heidelberg},
  isbn      = {978-3-642-02921-9},
  pages     = {25 -- 36},
  year      = {2009},
  language  = {en}
}
@article{FerreinJacobsSchifferetal.2009,
  author    = {Ferrein, Alexander and Jacobs, Stefan and Schiffer, Stefan and Beck, Daniel},
  title     = {Robust Collision Avoidance in Unknown Domestic Environments / Jacobs, Stefan ; Ferrein, Alexander ; Schiffer, Stefan ; Beck, Daniel ; Lakemeyer, Gerhard},
  series = {ROBOCUP 2009: ROBOT SOCCER WORLD CUP XIII},
  journal   = {ROBOCUP 2009: ROBOT SOCCER WORLD CUP XIII},
  publisher = {Springer},
  address   = {Berlin},
  pages     = {116 -- 127},
  year      = {2009},
  language  = {en}
}