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Translated from Algebra i Logika, Vol. 23, No. 5, pp. 512–529, September–October, 1984.
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Nikitin, A.A. Some algorithmic problems for projective planes. Algebra and Logic 23, 347–358 (1984). https://doi.org/10.1007/BF01982028
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DOI: https://doi.org/10.1007/BF01982028