@article{DAN_1996_350_3_a6,
     author = {V. V. Kondrat'ev and V. A. Utrobin},
     title = {Active restoration {\textendash} solution of the indeterminacy problem},
     journal = {Doklady Akademii Nauk},
     pages = {315--317},
     year = {1996},
     volume = {350},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1996_350_3_a6/}
}