@article{AL_2020_59_3_a5,
     author = {N. S. Romanovskii},
     title = {Divisible rigid groups. {IV.} {Definable} subgroups},
     journal = {Algebra i logika},
     pages = {344--366},
     publisher = {mathdoc},
     volume = {59},
     number = {3},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2020_59_3_a5/}
}