@article{TIMB_2010_18_1_a11,
     author = {V. A. Ustimenko},
     title = {On optimization problems for graphs and~security of digital communications},
     journal = {Trudy Instituta matematiki},
     pages = {116--122},
     year = {2010},
     volume = {18},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TIMB_2010_18_1_a11/}
}