@article{berry05email,
	title = {Email Surveillance Using Non-negative Matrix Factorization},
	address = {Hingham, MA, USA},
	author = {Michael W. Berry and Murray Browne},
	journal = {Comput. Math. Organ. Theory},
	number = {3},
	pages = {249--264},
	publisher = {Kluwer Academic Publishers},
	volume = {11},
	year = {2005},
	biburl = {http://www.bibsonomy.org/bibtex/256be23a42ad37f0c00ba784029e8e111/marianne},
	description = {Email Surveillance Using Non-negative Matrix Factorization},
	issn = {1381-298X}, doi = {http://dx.doi.org/10.1007/s10588-005-5380-5},
	keywords = {email enron }
}