@conference {r1d,
	title = {Nonnegative matrix factorization via rank-one downdating},
	booktitle = {Proceedings of the 2008 International Conference on Machine Learning},
	year = {2008},
	note = {Proceedings published online at \urlhttp://icml2008.cs.helsinki.fi/abstracts.shtml, Preliminary version of the full paper in arxiv.org, 0808.0120},
	author = {Michael Biggs and Ali Ghodsi and Stephen A. Vavasis}
}