Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1975_221_6_a2, author = {M. I. Kanovitch}, title = {A hierarchical semantic system with set variables}, journal = {Doklady Akademii Nauk}, pages = {1256--1259}, publisher = {mathdoc}, volume = {221}, number = {6}, year = {1975}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1975_221_6_a2/} }
M. I. Kanovitch. A hierarchical semantic system with set variables. Doklady Akademii Nauk, Tome 221 (1975) no. 6, pp. 1256-1259. http://geodesic.mathdoc.fr/item/DAN_1975_221_6_a2/