@article{IIGUM_2012_5_4_a0,
     author = {I. L. Vasilyev and A. V. Ushakov},
     title = {On an approach to the robustness in the case of the $p$-median problem},
     journal = {The Bulletin of Irkutsk State University. Series Mathematics},
     pages = {2--15},
     publisher = {mathdoc},
     volume = {5},
     number = {4},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IIGUM_2012_5_4_a0/}
}