@article{DM_2009_21_4_a9,
     author = {N. V. Gravin},
     title = {Nondegenerate colourings in the {Brooks} theorem},
     journal = {Diskretnaya Matematika},
     pages = {105--128},
     publisher = {mathdoc},
     volume = {21},
     number = {4},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_2009_21_4_a9/}
}