Topology symposium Siegen 1979 : proceedings of a symposium held at the University of Siegen, June 14-19, 1979 / ed. Ulrich Koschorke, Walter D. Neumann. - Berlin : Springer, 1980. - 495 p. - Lecture notes in mathematics ; v. 788 LNM ; v. 788 .

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Topología algebraica