TY - JOUR AU - Stéphane Bessy AU - Daniel Gonçalves AU - Jean-Sébastien Sereni TI - Two-floor buildings need eight colors JO - Journal of Graph Algorithms and Applications PY - 2015 SP - 1 EP - 9 VL - 19 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.7155/jgaa.00344/ DO - 10.7155/jgaa.00344 LA - en ID - JGAA_2015_19_1_a0 ER -