A groupoid of varieties of semigroups with zero
Izvestiâ vysših učebnyh zavedenij. Matematika, no. 11 (1982), pp. 77-79
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@article{IVM_1982_11_a11,
author = {T. A. Martynova},
title = {A groupoid of varieties of semigroups with zero},
journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
pages = {77--79},
publisher = {mathdoc},
number = {11},
year = {1982},
language = {ru},
url = {http://geodesic.mathdoc.fr/item/IVM_1982_11_a11/}
}
T. A. Martynova. A groupoid of varieties of semigroups with zero. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 11 (1982), pp. 77-79. http://geodesic.mathdoc.fr/item/IVM_1982_11_a11/