@article{1029001363,
author = {Berg, I. D.},
title = {On approximation of normal operators by weighted shifts.},
journal = {Michigan Math. J.},
volume = {21},
number = {3},
year = {1975},
pages = { 377-383},
language = {en},
url = {http://dml.mathdoc.fr/item/1029001363}
}
Berg, I. D. On approximation of normal operators by weighted shifts.. Michigan Math. J., Tome 21 (1975) no. 3, pp. 377-383. http://gdmltest.u-ga.fr/item/1029001363/