@article{IVM_1971_12_a12,
     author = {I. I. Mel'nik},
     title = {A~certain family of varieties of semigroups},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {103--108},
     year = {1971},
     number = {12},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1971_12_a12/}
}