@article{SF_1982__24_134554,
     author = {M.V. Volkov},
     title = {An example of the limit variety of semigroups.},
     journal = {Semigroup forum},
     pages = {319--326},
     publisher = {mathdoc},
     volume = {24},
     year = {1982},
     zbl = {0485.20050},
     url = {http://geodesic.mathdoc.fr/item/SF_1982__24_134554/}
}