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"On the number of connected and disconnected coverings over a manifold."
Valery A. Liskovets, Alexander D. Mednykh (2009)
- Valery A. Liskovets, Alexander D. Mednykh:
On the number of connected and disconnected coverings over a manifold. Ars Math. Contemp. 2(2): 181-189 (2009)
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