@article{ZNSL_2013_417_a0,
     author = {S. L. Berlov},
     title = {Independent sets and chromatic numbers of circle graphs},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {5--10},
     publisher = {mathdoc},
     volume = {417},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2013_417_a0/}
}