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Original Russian Text © A. G. Gushkalova, 2007, published in Izvestiya Vysshikh Uchebnykh Zavedenii. Matematika, 2007, No. 6, pp. 29–34.
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Gushkalova, A.G. About the hypothesis on two functionals. Russ Math. 51, 26–31 (2007). https://doi.org/10.3103/S1066369X07060047
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DOI: https://doi.org/10.3103/S1066369X07060047