@article{DM_1989_1_3_a15,
     author = {I. E. Bashtanov},
     title = {The number of relations that determine classes of constants and selector functions of $k$-valued logic},
     journal = {Diskretnaya Matematika},
     pages = {141--144},
     publisher = {mathdoc},
     volume = {1},
     number = {3},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_1989_1_3_a15/}
}