@article{GDZPPN00117763X, title = {Computing the CS Decomposition of a Partitioned Orthonormal Matrix}, journal = {Numerische Mathematik}, volume = {39}, year = {1982}, pages = {297-306}, zbl = {0516.65016}, url = {http://dml.mathdoc.fr/item/GDZPPN00117763X} }
Stewart, G.W. Computing the CS Decomposition of a Partitioned Orthonormal Matrix. Numerische Mathematik, Tome 39 (1982) pp. 297-306. http://gdmltest.u-ga.fr/item/GDZPPN00117763X/