Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1985_282_3_a6, author = {A. A. Shum}, title = {Relative varieties of algebraic systems and propositional calculi}, journal = {Doklady Akademii Nauk}, pages = {538--541}, publisher = {mathdoc}, volume = {282}, number = {3}, year = {1985}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1985_282_3_a6/} }
A. A. Shum. Relative varieties of algebraic systems and propositional calculi. Doklady Akademii Nauk, Tome 282 (1985) no. 3, pp. 538-541. http://geodesic.mathdoc.fr/item/DAN_1985_282_3_a6/