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1458343	Proceedings of 23-rd conference on geometry and topology [Текст] : Cluj-Napoca, September, 27-29, 1993 / "Babes-Bolyai" university,Faculty of mathematics and computer science; Department of geometry; Ed. D. Andrica, P. Enghis. — Cluj-Napoca : "Babes-Bolyai ''university of Cluj-Napoca, 1994. — V,222p. : ill.