@article{INTO_2020_177_a6,
     author = {O. Givradze},
     title = {Irreducible generating sets of complete semigroups of unions $B_X(S)$ defined by semilattices of the class $\Sigma_1(X,4)$},
     journal = {Itogi nauki i tehniki. Sovremenna\^a matematika i e\"e prilo\v{z}eni\^a. Temati\v{c}eskie obzory},
     pages = {69--73},
     publisher = {mathdoc},
     volume = {177},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTO_2020_177_a6/}
}