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2. T.A. Chapman and S. Ferry: Obstruction to finiteness in the proper category, to appear in the Houston Journal.
3. Hurewicz fiber maps with ANR fibers;Chapman;Topology,1977
4. M. Cohen: A Course In Simple Homotopy Theory, Springer-Verlag, Berlin and New York.
5. Partitions of unity in homotopy theory;Dieck;Compositio Math.,1971