Geodesic
The zeros of group characters
Trudy Matematicheskogo Instituta imeni V.A. Steklova, Tome 32 (1977) no. 6 
E. M. Zhmud'. The zeros of group characters. Trudy Matematicheskogo Instituta imeni V.A. Steklova, Tome 32 (1977) no. 6. http://geodesic.mathdoc.fr/item/RM_1977_32_6_a12/
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     author = {E. M. Zhmud'},
     title = {The zeros of group characters},
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     year = {1977},
     volume = {32},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1977_32_6_a12/}
}
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[1] W. Burnside, “On an arithmetical theorem connected with roots of unity and its applications to group characteristics”, Proc. Lond. Math. Soc. (2), 1 (1904), 112–116 | DOI

[2] P. X. Gallagher, “Zeros of characters of finite groups”, J. of Algebra, 4:1 (1966), 42–45 | DOI | MR | Zbl

[3] H. Wielandt, “Über die Existenz von Normalteilern in endlichen Gruppen”, Math. Nachr., 18 (1958), 274–280 | MR | Zbl