@Article{  schmickl09a,
  author = 	 {Thomas Schmickl and Heiko Hamann and Heinz W{\"o}rn and Karl Crailsheim},
  title = 	 {Two Different Approaches to a Macroscopic Model of a Bio-Inspired Robotic Swarm},
  journal = 	 {Robotics and Autonomous Systems},
  year = 	 {2009},
  volume = 	 {57},
  number = 	 {9},
  pages = 	 {913-921},
  month = 	 {September}
}