1. The crossing number of the n-cube;Eggleton;Notices Amer. Math. Soc.,1970
2. Crossing number problems;Erdös;Amer. Math. Monthly,1973
3. Crossing numbers of graphs;Guy,1972
4. Toroidal graphs with arbitrarily high crossing numbers;Harary;Nanta Math.,1973
5. The crossing number of K5,n;Kleitman;J. Combinatorial Theory,1970