Hao Shen Knut Hüper Block Jacobi-type methods for non-orthogonal joint diagonalisation. 3285-3288 2009 ICASSP http://dx.doi.org/10.1109/ICASSP.2009.4960326 conf/icassp/2009 db/conf/icassp/icassp2009.html#ShenH09