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Additional information
Institute of Mathematics, Siberian Branch, Academy of Sciences of the USSR, Novosibirsk. translated from Sibirskii Matematicheskii Zhurnal, Vol. 24, No. 2, pp. 114–132, March–April, 1983.
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Nikolaev, I.G. Smoothness of the metric of spaces with two-sided bounded Aleksandrov curvature. Sib Math J 24, 247–263 (1983). https://doi.org/10.1007/BF00968740
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DOI: https://doi.org/10.1007/BF00968740