Fa-Yu Wang Chong-Yung Chi Tsung-Han Chan Yue Joseph Wang Nonnegative Least-Correlated Component Analysis for Separation of Dependent Sources by Volume Maximization. 875-888 2010 32 IEEE Trans. Pattern Anal. Mach. Intell. 5 http://doi.ieeecomputersociety.org/10.1109/TPAMI.2009.72 db/journals/pami/pami32.html#WangCCW10