@article{GDZPPN000363472,
title = {A Lower Bound for the Optimal Crossing-Free Hamiltonian Cycle Problem.},
journal = {Discrete \& computational geometry},
volume = {2},
year = {1987},
pages = {327-344},
zbl = {0623.05037},
url = {http://dml.mathdoc.fr/item/GDZPPN000363472}
}
Hayward, R.B. A Lower Bound for the Optimal Crossing-Free Hamiltonian Cycle Problem.. Discrete & computational geometry, Tome 2 (1987) pp. 327-344. http://gdmltest.u-ga.fr/item/GDZPPN000363472/