@book{9392,
	author = {Van Valkenburg, M.E.},
	title = {Network analysis.- 3rd ed. / M.E.Van Valkenburg},
	publisher = {Englewood Cliffs, N.J., Prentice-Hall [1974]},
	address = {Englewood Cliffs, N.J., Prentice-Hall [1974]},
	edition = {3rd ed.}
}