@incollection{RNews-GCGG,
	author={Jeff Gentry,  Vincent Carey,  Emden Gansner,  Robert Gentleman},
	booktitle={R News},
	editor={Thomas Lumley},
	number=2,
	pages={14--18},
	title={Laying Out Pathways with RGraphviz},
	volume=4,
	year=2004,
}