@article {IOPORT.04047709,
    author       = {Soukup, Lajos},
    title        = {On chromatic number of product of graphs.},
    year         = {1988},
    journal      = {Commentationes Mathematicae Universitatis Carolinae},
    volume       = {29},
    number       = {1},
    issn         = {0010-2628},
    pages        = {1-12},
    publisher    = {Mathematical Institute of Charles University, Prague},
    abstract     = {It is shown that if ZFC is consistent, then so is $ZFC+GCH+$ ``There are two graphs, B and W, with cardinalities and chromatic numbers $\omega\sb 2$ such that the product of B and W has chromatic number $\omega$ ''.},
    identifier   = {04047709},
}