@article{RM_2006_61_5_a6,
     author = {L. L. Ivanov},
     title = {An estimate for the chromatic number of the space~$\mathbb R^4$},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {984--986},
     year = {2006},
     volume = {61},
     number = {5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_2006_61_5_a6/}
}