@article{DAN_1966_171_4_a7,
     author = {Yu. I. Lyubich},
     title = {Conditionality in general computational problems},
     journal = {Doklady Akademii Nauk},
     pages = {791--793},
     year = {1966},
     volume = {171},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1966_171_4_a7/}
}