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Line 9: == Sources and external links == * P. Paatero, U. Tapper, "Positive matrix factorization: A non-negative factor model with optimal utilization of error estimates of data values", ''[[Environmetrics]]'', 5:111-126, [[1994]]. * Pia Anttila, Pentti Paatero, Unto Tapper, Olli Järvinen. "Source identification of bulk wet deposition in Finland by positive matrix factorization", ''[[Atmospheric Environment]]'', 29(14):1705-1718, 1995 * [[Pentti Paatero]], "Least squares formulation of robust non-negative factor analysis", ''[[Chemometrics and Intelligent Laboratory Systems]]'', 37(1):23-35, 1997 May.

Non-negative matrix factorization: Difference between revisions