@article{ZNSL_2011_391_a4,
     author = {N. V. Gravin and D. V. Karpov},
     title = {On proper colorings of hypergraphs},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {79--89},
     publisher = {mathdoc},
     volume = {391},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2011_391_a4/}
}