@article{DM_1993_5_3_a11,
     author = {K. A. Zykov},
     title = {Realization of some systems of {Boolean} functions by schemes consisting of two-input elements},
     journal = {Diskretnaya Matematika},
     pages = {125--149},
     publisher = {mathdoc},
     volume = {5},
     number = {3},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_1993_5_3_a11/}
}