@article{SEMR_2008_5_a28,
     author = {O. V. Borodin and S. G. Hartke and A. O. Ivanova and A. V. Kostochka and D. B. West},
     title = {Circular $(5,2)$-coloring of sparse graphs},
     journal = {Sibirskie \`elektronnye matemati\v{c}eskie izvesti\^a},
     pages = {417--426},
     publisher = {mathdoc},
     volume = {5},
     year = {2008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SEMR_2008_5_a28/}
}