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Institute of Mathematics, Siberian Branch, Academy of Sciences of the USSR, Novosibirsk. Translated from Sibirskii Matematicheskii Zhurnal, Vol. 33, No. 2, pp. 49–65, March–April, 1992.
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Gol'dshtein, V.M., Kuz'minov, V.I. & Shvedov, I.A. Approximation of exact and closed differential forms by finite ones. Sib Math J 33, 219–233 (1992). https://doi.org/10.1007/BF00971092
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DOI: https://doi.org/10.1007/BF00971092