Andreas Janecek Ying Tan 0002 Iterative improvement of the Multiplicative Update NMF algorithm using nature-inspired optimization. 1668-1672 2011 ICNC https://doi.org/10.1109/ICNC.2011.6022356 conf/icnc/2011 db/conf/icnc/icnc2011.html#JanecekT11