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Translated from Sibirskii Matematicheskii Zhurnal, Vol. 14, No. 5, pp. 1065–1075, September–October, 1973.
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Ryshkov, S.S. On the question of final ξ-optimality of lattices providing the closest lattice packing of n-dimensional spheres. Sib Math J 14, 743–750 (1973). https://doi.org/10.1007/BF00969911
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DOI: https://doi.org/10.1007/BF00969911