Geodesic
Example of a Five-Sheeted Exotic Covering over $\mathbb C^2$
Matematičeskie zametki, Tome 71 (2002) no. 4, pp. 532-547.

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In the paper, an example of a five-sheeted covering which is a topological counterexample in the same sense as Vitushkin's example is proposed. Its topological characteristics such as generators of the two-dimensional homology and values of canonical classes are computed. 
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G. V. Egorov. Example of a Five-Sheeted Exotic Covering over $\mathbb C^2$. Matematičeskie zametki, Tome 71 (2002) no. 4, pp. 532-547. http://geodesic.mathdoc.fr/item/MZM_2002_71_4_a4/

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