@article{DM_1997_9_3_a10,
     author = {S. S. Marchenkov},
     title = {$S$-classification of functions of many-valued logic},
     journal = {Diskretnaya Matematika},
     pages = {125--152},
     publisher = {mathdoc},
     volume = {9},
     number = {3},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_1997_9_3_a10/}
}