@article{DAN_1997_352_1_a3,
     author = {V. A. Gurvich},
     title = {Dual cores and influence functions},
     journal = {Doklady Akademii Nauk},
     pages = {18--22},
     publisher = {mathdoc},
     volume = {352},
     number = {1},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1997_352_1_a3/}
}