%0 Journal Article %A Stéphane Bessy %A Daniel Gonçalves %A Jean-Sébastien Sereni %T Two-floor buildings need eight colors %J Journal of Graph Algorithms and Applications %D 2015 %P 1-9 %V 19 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.7155/jgaa.00344/ %R 10.7155/jgaa.00344 %G en %F JGAA_2015_19_1_a0