@article{DM_1993_5_3_a2,
     author = {A. A. Irmatov},
     title = {On the number of threshold functions},
     journal = {Diskretnaya Matematika},
     pages = {40--43},
     publisher = {mathdoc},
     volume = {5},
     number = {3},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_1993_5_3_a2/}
}