@book{19997,
	author = {Bang-Jensen, Jorgen and Gutin, Gregory and Gutin, Gregory ; jt. auth.},
	title = {Digraphs; theory, algorithms and applications},
	publisher = {Springer-Verlag},
	year = {2001},
	series = {Springer monographs in Mathematics},
	address = {London},
	note = {"Purchased under NBHM grant for the year 2000-2001"}
}