@article{DAN_1985_282_3_a2,
     author = {N. R. Emel'yanov},
     title = {Complexity of the problem of expressibility in many-valued logics},
     journal = {Doklady Akademii Nauk},
     pages = {525--529},
     publisher = {mathdoc},
     volume = {282},
     number = {3},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1985_282_3_a2/}
}