@article{DEMR_2014_1_a2,
     author = {A. M. Magomedov},
     title = {Bipartite ${(6,3)}_6$-biregular graphs which do not allow interval coloring},
     journal = {Daghestan Electronic Mathematical Reports},
     pages = {71--78},
     publisher = {mathdoc},
     volume = {1},
     year = {2014},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DEMR_2014_1_a2/}
}