Varieties of groupoids associated with involuted restrictive bisemigroups of binary relations.
Bredikhin, D.A.
Semigroup forum, Tome 44 (1992), p. 87-92 / Harvested from Göttinger Digitalisierungszentrum
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Publié le : 1992-01-01
EUDML-ID : urn:eudml:doc:135130 
@article{GDZPPN001261444,
     title = {Varieties  of groupoids associated  with involuted restrictive bisemigroups of binary relations.},
     journal = {Semigroup forum},
     volume = {44},
     year = {1992},
     pages = {87-92},
     zbl = {0792.20066},
     url = {http://dml.mathdoc.fr/item/GDZPPN001261444}
}

Bredikhin, D.A. Varieties  of groupoids associated  with involuted restrictive bisemigroups of binary relations.. Semigroup forum, Tome 44 (1992) pp. 87-92. http://gdmltest.u-ga.fr/item/GDZPPN001261444/