%0 Journal Article %A V. L. Usoltsev %T The subdirect irreducibility and the atoms of congruence lattices of algebras with one operator and the symmetric main operation %J Čebyševskij sbornik %D 2021 %P 257-270 %V 22 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/CHEB_2021_22_2_a14/ %G ru %F CHEB_2021_22_2_a14