@book {Learning2008,
	author = {J. Li and J. Mirkovic and T. Ehrenkranz and M. Wang and P. Reiher and L. Zhang},
	title = {{Learning the valid incoming direction of IP packets}},
	publisher = {Computer Networks},
	volume = {52},
	number = {2},
	pp = {399-417},
	year = {2008},
}