@article{IVM_1998_11_a13,
     author = {V. V. Butakov and L. M. Martynov},
     title = {Semigroups all of whose noncyclic subsemigroups are ideals},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {94--96},
     publisher = {mathdoc},
     number = {11},
     year = {1998},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1998_11_a13/}
}