@conference {PBB11,
	title = {A graph theoretic characterization of power network vulnerabilities},
	booktitle = {2011 American Control Conference},
	year = {2011},
	month = {June 29 - July 1},
	pages = {3918 - 3923},
	address = {San Francisco, CA},
	keywords = {Robotics},
	author = {F. Pasqualetti and A. Bicchi and F. Bullo}
}
