@article{CMUC_1999_40_2_a2,
     author = {T\r{u}ma, Ji\v{r}{\'\i}},
     title = {Representing lattices by homotopy groups of graphs},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {215--221},
     year = {1999},
     volume = {40},
     number = {2},
     mrnumber = {1732642},
     zbl = {0977.06003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1999_40_2_a2/}
}