@article{DM_1991_3_1_a3,
     author = {S. B. Gashkov},
     title = {Boolean functions that are difficult to realize and real numbers that are difficult to evaluate},
     journal = {Diskretnaya Matematika},
     pages = {48--60},
     publisher = {mathdoc},
     volume = {3},
     number = {1},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_1991_3_1_a3/}
}