@article{MS2_1978__43_166598,
     author = {R.J. Evans and I.M. Isaacs},
     title = {Fields generated by linear combinations of roots of unity, {II.}},
     journal = {Mathematica Scandinavica},
     pages = {26--34},
     publisher = {mathdoc},
     volume = {43},
     year = {1978},
     zbl = {0405.12007},
     url = {http://geodesic.mathdoc.fr/item/MS2_1978__43_166598/}
}