@article{DA_2010_17_2_a2,
     author = {A. V. Dolgushev and A. V. Kel'manov},
     title = {On the issue of algorithmic complexity of one cluster analysis problem},
     journal = {Diskretnyj analiz i issledovanie operacij},
     pages = {39--45},
     publisher = {mathdoc},
     volume = {17},
     number = {2},
     year = {2010},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DA_2010_17_2_a2/}
}