Voir la notice de l'article provenant de la source Math-Net.Ru
@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/} }
N. R. Emel'yanov. Complexity of the problem of expressibility in many-valued logics. Doklady Akademii Nauk, Tome 282 (1985) no. 3, pp. 525-529. http://geodesic.mathdoc.fr/item/DAN_1985_282_3_a2/