A Lower Bound for the Optimal Crossing-Free Hamiltonian Cycle Problem.
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R.B. Hayward (1987)
Discrete & computational geometry
M. M. Sysło (1974)
Applicationes Mathematicae
E. Specker (1978)
Elemente der Mathematik
J. Dębowy (1977)
Applicationes Mathematicae
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