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Raspad SSSR 1991g by Николай Владимирович Ефимов Kvadratichnie formi i matrici. Obshaya teoriya linii vtorogo ... by Николай Владимирович Ефимов Vvedenie v teoriu vneshnih form. 2-e izd by Николай Владимирович Ефимов Vysshaia geometriia. by Николай Владимирович Ефимов Краткий курс аналитической геометрии by Николай Владимирович Ефимов Kvadratichnye formy i matritsy. izd.4, uch.posob. by Николай Владимирович Ефимов


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