@article{PDM_2008_2_a16,
     author = {D. N. Kolegov and Yu. N. Chernushenko},
     title = {About the {CTF} {\textendash} computer security competitions},
     journal = {Prikladna\^a diskretna\^a matematika},
     pages = {81--83},
     year = {2008},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PDM_2008_2_a16/}
}