@article{PDM_2013_4_a3,
     author = {I. G. Velichko and A. I. Zinchenko},
     title = {$V$-graphs and their relation to the problem of locating objects in a~plane},
     journal = {Prikladna\^a diskretna\^a matematika},
     pages = {41--46},
     publisher = {mathdoc},
     number = {4},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PDM_2013_4_a3/}
}