@article{RM_2013_68_5_a7,
     author = {E. I. Ponomarenko and A. M. Raigorodskii},
     title = {A new lower bound for the chromatic number of the rational space},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {960--962},
     publisher = {mathdoc},
     volume = {68},
     number = {5},
     year = {2013},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_2013_68_5_a7/}
}