@article{DA_2013_20_4_a3,
     author = {A. V. Kelmanov and V. I. Khandeev},
     title = {A $2$-approximation polynomial algorithm for one clustering problem},
     journal = {Diskretnyj analiz i issledovanie operacij},
     pages = {36--45},
     publisher = {mathdoc},
     volume = {20},
     number = {4},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DA_2013_20_4_a3/}
}