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"Contractible edges in longest cycles in non-Hamiltonian graphs."
Mark N. Ellingham, Robert L. Hemminger, Kathryn E. Johnson (1994)
- Mark N. Ellingham, Robert L. Hemminger, Kathryn E. Johnson:
Contractible edges in longest cycles in non-Hamiltonian graphs. Discret. Math. 133(1-3): 89-98 (1994)
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