@article{IVM_1978_8_a9,
     author = {L. M. Martynov and T. A. Martynova},
     title = {Ideally attainable varieties of inverse semigroups},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {67--73},
     year = {1978},
     number = {8},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1978_8_a9/}
}