@article{PDM_2009_1_a6,
     author = {D. N. Kolegov},
     title = {Usage formal models for vulnerability analysis},
     journal = {Prikladna\^a diskretna\^a matematika},
     pages = {113--116},
     publisher = {mathdoc},
     number = {1},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PDM_2009_1_a6/}
}