Sra, S Department Empirical Inference, Max Planck Institute for Biological Cybernetics, Max Planck Society;
Kim, D., Sra, S., & Dhillon, I. (2008). Fast Projection-based Methods for the Least Squares Nonnegative Matrix Approximation Problem. Statistical Analysis and Data Mining, 1(1), 38-51. doi:10.1002/sam.104.