@article{DM_1996_8_4_a5,
     author = {A. A. Bolotov},
     title = {On metric clustering},
     journal = {Diskretnaya Matematika},
     pages = {62--78},
     publisher = {mathdoc},
     volume = {8},
     number = {4},
     year = {1996},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_1996_8_4_a5/}
}