@article{DAN_1996_347_3_a9,
     author = {P. D. Krut'ko and G. A. Chkheidze},
     title = {Necessary and sufficient conditions for the extinguishing of},
     journal = {Doklady Akademii Nauk},
     pages = {324--326},
     publisher = {mathdoc},
     volume = {347},
     number = {3},
     year = {1996},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1996_347_3_a9/}
}