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Additional information
Institute of Strength Problems, Academy of Sciences of the Ukrainian SSR, Kiev. Translated from Problemy Prochnosti, No. 7, pp. 112–118, July, 1983.
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Umanskii, S.É. Construction of more effective diagrams of the finite-element method on the basis of softened and mixed approximations. Strength Mater 15, 1022–1029 (1983). https://doi.org/10.1007/BF01528954
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DOI: https://doi.org/10.1007/BF01528954