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Ternopol'. Translated fromSibirskiř Matematicheskiř Zhurnal, Vol. 38, No. 5, pp. 1008–1017, September–October, 1997.
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Bugir, M.K. Disoscillability of solutions to partial differential equations on manifolds of constant curvature and mean value theorems. Sib Math J 38, 871–880 (1997). https://doi.org/10.1007/BF02673028
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DOI: https://doi.org/10.1007/BF02673028