@article{DM_2016_28_4_a6,
     author = {V. V. Kochergin and A. V. Mikhailovich},
     title = {The minimum number of negations in circuits for systems of multi-valued functions},
     journal = {Diskretnaya Matematika},
     pages = {80--90},
     publisher = {mathdoc},
     volume = {28},
     number = {4},
     year = {2016},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_2016_28_4_a6/}
}