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This paper is a contribution to the research project “Darstellungstheorie von endlichen Gruppen und endlichdimensionalen Algebren” of the DFG.
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Huppert, B., Manz, O. Degree-problems I squarefree character degrees. Arch. Math 45, 125–132 (1985). https://doi.org/10.1007/BF01270483
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DOI: https://doi.org/10.1007/BF01270483