TY - JOUR AU - Lewkowicz, Marek Kazimierz TI - Coloring Four-uniform Hypergraphs on Nine Vertices JO - Canadian mathematical bulletin PY - 2015 SP - 317 EP - 319 VL - 58 IS - 2 UR - http://geodesic.mathdoc.fr/articles/10.4153/CMB-2015-008-7/ DO - 10.4153/CMB-2015-008-7 ID - 10_4153_CMB_2015_008_7 ER -