@article{IVM_2019_2_a2,
     author = {D. Kh. Zainetdinov},
     title = {Limitwise monotonic reducibility of sets and $\Sigma$-definability of abelian groups},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {21--28},
     publisher = {mathdoc},
     number = {2},
     year = {2019},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2019_2_a2/}
}