%0 Journal Article %A Tůma, Jiří %T Representing lattices by homotopy groups of graphs %J Commentationes Mathematicae Universitatis Carolinae %D 1999 %P 215-221 %V 40 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMUC_1999__40_2_a2/ %G en %F CMUC_1999__40_2_a2