@article{GDZPPN002361981,
title = {The spectrum associated to a radical operation.},
journal = {Mathematica Scandinavica},
volume = {73},
year = {1993},
pages = {5-14},
zbl = {0790.14001},
url = {http://dml.mathdoc.fr/item/GDZPPN002361981}
}
Ernström, Lars. The spectrum associated to a radical operation.. Mathematica Scandinavica, Tome 73 (1993) pp. 5-14. http://gdmltest.u-ga.fr/item/GDZPPN002361981/