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Original Russian Text © N.B. Kerimov, Z.S. Aliev, E.A. Agaev, 2012, published in Doklady Akademii Nauk, 2012, Vol. 444, No. 3, pp. 250–252.
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Kerimov, N.B., Aliev, Z.S. & Agaev, E.A. On the oscillation of eigenfunctions of a fourth-order spectral problem. Dokl. Math. 85, 355–357 (2012). https://doi.org/10.1134/S1064562412030155
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DOI: https://doi.org/10.1134/S1064562412030155