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Artykbaev A., Sokolov D.D. Geometry "in general" in flat space-time. Tashkent, "Fan", 1991. - 180 p
E.K Kurbonov. Cyclic surfaces of the Galiei space // UzMZh, 2001, №2, pp.51- 57
B.M. Sultans. The existence of a cyclic surface by a given function of complete curvature ”// Bulletin of UzMU, 2017 №2 \ 2, p. 201-204
B.A. Rosenfeld Non-Euclidean spaces. M .: Science, 1969.-548 p.