Idempotents in the semigroup of quasivarieties of torsion-free groups
Matematičeskie zametki, Tome 47 (1990) no. 5, pp. 21-25
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@article{MZM_1990_47_5_a2,
author = {A. I. Budkin},
title = {Idempotents in the semigroup of quasivarieties of torsion-free groups},
journal = {Matemati\v{c}eskie zametki},
pages = {21--25},
year = {1990},
volume = {47},
number = {5},
language = {ru},
url = {http://geodesic.mathdoc.fr/item/MZM_1990_47_5_a2/}
}
A. I. Budkin. Idempotents in the semigroup of quasivarieties of torsion-free groups. Matematičeskie zametki, Tome 47 (1990) no. 5, pp. 21-25. http://geodesic.mathdoc.fr/item/MZM_1990_47_5_a2/