@article{DA_2001_8_4_a1,
     author = {O. V. Borodin and H. Broersma and A. N. Glebov and J. van den Heuvel},
     title = {Minimal degrees and chromatic numbers of squares of planar graphs},
     journal = {Diskretnyj analiz i issledovanie operacij},
     pages = {9--33},
     publisher = {mathdoc},
     volume = {8},
     number = {4},
     year = {2001},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DA_2001_8_4_a1/}
}