@article{DM_1989_1_1_a4,
     author = {V. B. Alekseev},
     title = {The number of functions in some closed classes of a~partial $k$-valued logic},
     journal = {Diskretnaya Matematika},
     pages = {23--33},
     publisher = {mathdoc},
     volume = {1},
     number = {1},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_1989_1_1_a4/}
}