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Translated from Matematicheskie Zametki, Vol. 31, No. 1, pp. 117–126, January, 1982.
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Nevesenko, N.V., Oshman, E.V. Metric projection onto convex sets. Mathematical Notes of the Academy of Sciences of the USSR 31, 59–64 (1982). https://doi.org/10.1007/BF01146270
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DOI: https://doi.org/10.1007/BF01146270