@article{VSPUI_2011_2_a3,
     author = {D. A. Eibozhenko},
     title = {$k${-Clustering} optimization algorithmfor {Steiner} problem in directed graphs},
     journal = {Vestnik Sankt-Peterburgskogo universiteta. Prikladna\^a matematika, informatika, processy upravleni\^a},
     pages = {29--39},
     year = {2011},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VSPUI_2011_2_a3/}
}