@article{MZM_2019_105_3_a15,
     author = {A. I. Rubinshtein},
     title = {On a {Set} of {Weakly} {Multiplicative} {Systems}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {471--475},
     publisher = {mathdoc},
     volume = {105},
     number = {3},
     year = {2019},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2019_105_3_a15/}
}