@article{DAN_1969_186_3_a4,
     author = {E. Yu. Zakharova and V. B. Kudryavtsev and S. V. Yablonskii},
     title = {Precomplete classes in $k$-valued logics},
     journal = {Doklady Akademii Nauk},
     pages = {509--512},
     publisher = {mathdoc},
     volume = {186},
     number = {3},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1969_186_3_a4/}
}