@article{MT_1994_27_a2,
     author = {S. B. Gashkov},
     title = {On the complexity of the approximate realization of some classical functions},
     journal = {Matemati\v{c}eskie trudy},
     pages = {14--33},
     year = {1994},
     volume = {27},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MT_1994_27_a2/}
}