@article{DM_2012_24_3_a9,
     author = {A. A. Serov},
     title = {Bounds for the number of {Boolean} functions admitting quadratic approximations of given accuracy},
     journal = {Diskretnaya Matematika},
     pages = {90--107},
     publisher = {mathdoc},
     volume = {24},
     number = {3},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_2012_24_3_a9/}
}