%0 Journal Article %A Brandes, Ulrik %A Handke, Dagmar %T NP-Completeness Results for Minimum Planar Spanners %J Discrete mathematics & theoretical computer science %D 1998-1999 %V 3 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.46298/dmtcs.257/ %R 10.46298/dmtcs.257 %G en %F DMTCS_1998_3_1_a0