@article {422,
	title = {Dealing with midair collisions in dense collective aerial systems},
	journal = {Journal of Field Robotics  },
	volume = {28},
	year = {2011},
	month = {May/June 2011},
	chapter = {405{\textendash}423},
	author = {Severin Leven, and Jean-Christophe Zufferey, and Dario Floreano,}
}
