%0 Journal Article %A Banerjee, Amitayu %A Gyenis, Zalán %T Chromatic number of the product of graphs, graph homomorphisms, antichains and cofinal subsets of posets without AC %J Commentationes Mathematicae Universitatis Carolinae %D 2021 %P 361-382 %V 62 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.14712/1213-7243.2021.028/ %R 10.14712/1213-7243.2021.028 %G en %F 10_14712_1213_7243_2021_028