@article{DAN_1994_339_2_a6,
     author = {V. F. Yakovlev},
     title = {The {Ashby} principle in a hierarchy of representations of},
     journal = {Doklady Akademii Nauk},
     pages = {176--178},
     year = {1994},
     volume = {339},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1994_339_2_a6/}
}