@article{PFMT_2015_4_a14,
     author = {V. G. Safonov and I. N. Safonova},
     title = {On commutative semigroups of soluble totally $\omega$-saturated formations},
     journal = {Problemy fiziki, matematiki i tehniki},
     pages = {80--86},
     publisher = {mathdoc},
     number = {4},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PFMT_2015_4_a14/}
}