@article{DAN_1958_123_2_a3,
     author = {Yu. I. Zhuravlev},
     title = {Mathematical methods of controlling abstract transformations},
     journal = {Doklady Akademii Nauk},
     pages = {227--230},
     year = {1958},
     volume = {123},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1958_123_2_a3/}
}