@article{AL_2020_59_5_a4,
     author = {A. A. Stepanova and D. O. Ptakhov},
     title = {Axiomatizability of the class of subdirectly irreducible acts over an {Abelian} group},
     journal = {Algebra i logika},
     pages = {582--593},
     year = {2020},
     volume = {59},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2020_59_5_a4/}
}