@article{DA_2009_16_1_a4,
     author = {D. B. Khoroshilova},
     title = {On two-colour perfect colourings of circular graphs},
     journal = {Diskretnyj analiz i issledovanie operacij},
     pages = {80--92},
     publisher = {mathdoc},
     volume = {16},
     number = {1},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DA_2009_16_1_a4/}
}