@article{PDM_2009_10_a47,
     author = {M. B. Abrosimov},
     title = {Computational complexity of graph extensions},
     journal = {Prikladna\^a diskretna\^a matematika},
     pages = {94--95},
     publisher = {mathdoc},
     number = {10},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PDM_2009_10_a47/}
}