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Vojislav G. Avakumović zum 65. Geburtstag gewidmet
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Brüning, J., Willgerodt, W. Eine Verallgemeinerung eines Satzes von N. Kuiper. Math. Ann. 220, 47–58 (1976). https://doi.org/10.1007/BF01354528
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DOI: https://doi.org/10.1007/BF01354528