@article{IVM_2004_2_a9,
     author = {L. M. Martynov},
     title = {Reduced varieties of semigroups},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {76--79},
     publisher = {mathdoc},
     number = {2},
     year = {2004},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2004_2_a9/}
}