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57A15 

• Moran, Daniel A.: Corrigendum et addendum ad: “Minimal cell coverings of sphere bundles over spheres”. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 20 (1979), issue 1, pp. 189-190
• Damm, Heinz: Zur Zerlegung des $E_n$ durch einfache Hyperflächen. (German) [On decomposition of $E_n$ by simple hypersurfaces]. Czechoslovak Mathematical Journal, vol. 28 (1978), issue 3, pp. 480-483
• Moran, Daniel A.: Minimal cell coverings of sphere bundles over spheres. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 16 (1975), issue 1, pp. 147-149
• Moran, Daniel A.: Minimal cell coverings of some sphere bundles. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 14 (1973), issue 4, pp. 647-650
• de Groot, J.: On the topological characterization of manifolds. (English). In: Novák, J. (ed.): General Topology and its Relations to Modern Analysis and Algebra. Proceedings of the Third Prague Topological Symposium, 1971. Academia Publishing House of the Czechoslovak Academy of Sciences, Praha, 1972. pp. 155-158