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"Disjoint Cycles in Directed Graphs on the Torus and the Klein Bottle."
Guoli Ding, Alexander Schrijver, Paul D. Seymour (1993)
- Guoli Ding, Alexander Schrijver, Paul D. Seymour:
Disjoint Cycles in Directed Graphs on the Torus and the Klein Bottle. J. Comb. Theory B 58(1): 40-45 (1993)
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