TY - JOUR AU - R.B. Hayward TI - A Lower Bound for the Optimal Crossing-Free Hamiltonian Cycle Problem. JO - Discrete & computational geometry PY - 1987 SP - 327 EP - 344 VL - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DCG_1987__2_131026/ ID - DCG_1987__2_131026 ER -