@article{VSPUI_2012_3_a2,
     author = {D. A. Eibozhenko},
     title = {Approximation algorithm $S^*$ for {Steiner} problem in {Euclidean} directed graphs},
     journal = {Vestnik Sankt-Peterburgskogo universiteta. Prikladna\^a matematika, informatika, processy upravleni\^a},
     pages = {23--32},
     year = {2012},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VSPUI_2012_3_a2/}
}