@article{01016569, title = {On the approximation numbers of large Toeplitz matrices.}, journal = {Documenta Mathematica}, volume = {2}, year = {1997}, pages = {1-29}, zbl = {0873.47014}, language = {en}, url = {http://dml.mathdoc.fr/item/01016569} }
Böttcher, A. On the approximation numbers of large Toeplitz matrices.. Documenta Mathematica, Tome 2 (1997) pp. 1-29. http://gdmltest.u-ga.fr/item/01016569/