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JOURNALS // Uchenye Zapiski Moskovskogo Gosudarstvennogo Universiteta // Archive
Uch. Zap. Mosk. Gos. Univ., 1951 Issue 148, Pages 15–20 (Mi uzmu65)
Some special questions relating to interpretations of the plane geometry of Lobachevskii

A. V. Yablonovskii, V. G. Yampol'skii




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