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@article{AL_1991_30_2_a2, author = {T. M. Kuz'mina}, title = {Generalized semilattices and $m$-degrees of index {sets.~II}}, journal = {Algebra i logika}, pages = {168--180}, publisher = {mathdoc}, volume = {30}, number = {2}, year = {1991}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1991_30_2_a2/} }
T. M. Kuz'mina. Generalized semilattices and $m$-degrees of index sets.~II. Algebra i logika, Tome 30 (1991) no. 2, pp. 168-180. http://geodesic.mathdoc.fr/item/AL_1991_30_2_a2/