@article{DA_2010_17_6_a0,
     author = {V. L. Beresnev and A. A. Melnikov},
     title = {Approximation algorithms for the competitive facility location problem},
     journal = {Diskretnyj analiz i issledovanie operacij},
     pages = {3--19},
     publisher = {mathdoc},
     volume = {17},
     number = {6},
     year = {2010},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DA_2010_17_6_a0/}
}