83 citations to https://www.mathnet.ru/rus/rm1401
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Sergei Artemov, International Mathematical Series, 5, Mathematical Problems from Applied Logic II, 2007, 1
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Sergei Artemov, Studies in Logic and Practical Reasoning, 3, Handbook of Modal Logic, 2007, 927
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Beklemishev L.D., Joosten J.J., Vervoort M., “A finitary treatment of the closed fragment of Japaridze's provability logic”, J. Logic Comput., 15:4 (2005), 447–463