@article{GDZPPN002222582,
title = {On the Spectra of Finite-Dimensional Pertobations of Matrix Multiplication Operators.},
journal = {Manuscripta mathematica},
volume = {29},
year = {1979},
pages = {351-360},
zbl = {0436.47042},
url = {http://dml.mathdoc.fr/item/GDZPPN002222582}
}
Gohberg, I.; Azoff, E.; Clancey, K. On the Spectra of Finite-Dimensional Pertobations of Matrix Multiplication Operators.. Manuscripta mathematica, Tome 29 (1979) pp. 351-360. http://gdmltest.u-ga.fr/item/GDZPPN002222582/