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3. Bokal, D., On the crossing numbers of Cartesian products with paths, J. Combin. Theory B (to appear). http://lp.fmf.uni-lj.si/~drago/pathProducts.pdf
4. The crossing number of Cm×Cn is as conjectured for n⩾m(m+1);Glebsky;J. Graph Treory,2004
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