@article{1077469292,
author = {Knopp, Marvin Isadore},
title = {Determination of certain roots of unity in the theory of
automorphic forms of dimension zero},
journal = {Duke Math. J.},
volume = {27},
number = {1},
year = {1960},
pages = { 497-506},
language = {en},
url = {http://dml.mathdoc.fr/item/1077469292}
}
Knopp, Marvin Isadore. Determination of certain roots of unity in the theory of
automorphic forms of dimension zero. Duke Math. J., Tome 27 (1960) no. 1, pp. 497-506. http://gdmltest.u-ga.fr/item/1077469292/