@ARTICLE{Petrovic_Lilienthal:RAS:2011,
  AUTHOR = {Petrov\'c, Ivan and Lilienthal, Achim J.},
  TITLE = {Special Issue ECMR 2009},
  JOURNAL = {Robotics and Autonomous Systems},
  YEAR = {2011},
  VOLUME = {59},
  NUMBER = {5},
  PAGES = {263--342},
  MONTH = {May}
}