@article{SF_1980__20_134404,
     author = {M.V. Sapir},
     title = {On the quasivarieties generated by finite semigroups.},
     journal = {Semigroup forum},
     pages = {73--88},
     publisher = {mathdoc},
     volume = {20},
     year = {1980},
     zbl = {0438.08006},
     url = {http://geodesic.mathdoc.fr/item/SF_1980__20_134404/}
}