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Translated from Sibirskii Matematicheskii Zhurnal, Vol. 11, No. 5, pp. 1093–1097, September–October, 1970.
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Kratko, M.I. Information graphs. Sib Math J 11, 812–815 (1970). https://doi.org/10.1007/BF00967840
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DOI: https://doi.org/10.1007/BF00967840